diff --git a/jest.config.js b/jest.config.js
new file mode 100644
index 0000000000..6c0d612ea6
--- /dev/null
+++ b/jest.config.js
@@ -0,0 +1,20 @@
+
+
+module.exports = {
+  runner: 'jest-electron/runner',
+  testEnvironment: 'jest-electron/environment',
+  preset: 'ts-jest',
+  collectCoverage: false,
+  collectCoverageFrom: [
+    'src/**/*.{ts,js}',
+    '!**/node_modules/**',
+    '!**/vendor/**'
+  ],
+  testRegex: '/tests/.*-spec\\.ts?$',
+  moduleDirectories: [ 'node_modules', 'src' ],
+  moduleFileExtensions: [ 'js', 'ts', 'json' ],
+  moduleNameMapper: {
+    '@g6/(.*)': '<rootDir>/src/$1',
+    '@g6/types': '<rootDir>/types'
+  }
+};
diff --git a/package.json b/package.json
index 08dcd9b1cd..299f46384b 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "clean": "rimraf esm lib dist",
     "lint": "lint-staged",
     "test": "jest",
-    "test-live": "DEBUG_MODE=1 jest --watch  ./tests/unit/behavior/index-spec.ts",
+    "test-live": "DEBUG_MODE=1 jest --watch  ./tests/unit/graph/controller/mode-spec.ts",
     "coverage": "jest --coverage",
     "ci": "run-s build coverage",
     "doc": "rimraf apis && typedoc",
@@ -81,18 +81,6 @@
       "git add"
     ]
   },
-  "jest": {
-    "runner": "jest-electron/runner",
-    "testEnvironment": "jest-electron/environment",
-    "preset": "ts-jest",
-    "collectCoverage": false,
-    "collectCoverageFrom": [
-      "src/**/*.{ts,js}",
-      "!**/node_modules/**",
-      "!**/vendor/**"
-    ],
-    "testRegex": "/tests/.*-spec\\.ts?$"
-  },
   "repository": {
     "type": "git",
     "url": "https://github.com/antvis/g6"
diff --git a/src/behavior/behavior.ts b/src/behavior/behavior.ts
index 8747634cc2..b2d99a606f 100644
--- a/src/behavior/behavior.ts
+++ b/src/behavior/behavior.ts
@@ -1,10 +1,10 @@
 import clone from '@antv/util/lib/clone'
-import { IBehaviorOpation } from '../../types';
+import { BehaviorOpation } from '@g6/types';
 import BehaviorOption from './behaviorOption'
 
 export default class Behavior {
   private static types = {}
-  public static registerBehavior<T, U>(type: string, behavior: IBehaviorOpation<U>) {
+  public static registerBehavior<T, U>(type: string, behavior: BehaviorOpation<U>) {
     if(!behavior) {
       throw new Error(`please specify handler for this behavior: ${type}`)
     }
diff --git a/src/behavior/behaviorOption.ts b/src/behavior/behaviorOption.ts
index 259680d87d..4522810a76 100644
--- a/src/behavior/behaviorOption.ts
+++ b/src/behavior/behaviorOption.ts
@@ -1,7 +1,7 @@
 import each from '@antv/util/lib/each'
 import wrapBehavior from '@antv/util/lib/wrap-behavior'
-import { G6Event } from '../../types';
-import { IGraph } from '../interface/graph'
+import { IGraph } from '@g6/interface/graph'
+import { G6Event } from '@g6/types';
 
 export default class BehaviorOption {
   private _events = null
diff --git a/src/behavior/drag-canvas.ts b/src/behavior/drag-canvas.ts
index 19085386f4..25eb3a0554 100644
--- a/src/behavior/drag-canvas.ts
+++ b/src/behavior/drag-canvas.ts
@@ -1,5 +1,5 @@
-import { G6Event, IG6GraphEvent } from "../../types";
-import { cloneEvent } from '../util/base'
+import { G6Event, IG6GraphEvent } from "@g6/types";
+import { cloneEvent } from '@g6/util/base'
 const abs = Math.abs
 const DRAG_OFFSET = 10
 const ALLOW_EVENTS = [ 16, 17, 18 ]
diff --git a/src/graph/controller/index.ts b/src/graph/controller/index.ts
new file mode 100644
index 0000000000..4c836e5ac6
--- /dev/null
+++ b/src/graph/controller/index.ts
@@ -0,0 +1 @@
+export { default as Mode } from './mode'
\ No newline at end of file
diff --git a/src/graph/controller/mode.ts b/src/graph/controller/mode.ts
new file mode 100644
index 0000000000..e085394c66
--- /dev/null
+++ b/src/graph/controller/mode.ts
@@ -0,0 +1,175 @@
+import each from '@antv/util/lib/each'
+import isArray from '@antv/util/lib/is-array'
+import isString from '@antv/util/lib/is-string'
+import Behavior from '@g6/behavior/behavior'
+import { IBehavior } from '@g6/interface/behavior';
+import { IGraph, IMode, IModeType } from '@g6/interface/graph';
+
+export default class Mode {
+  private graph: IGraph
+  /**
+   * modes = {
+   *  default: [ 'drag-node', 'zoom-canvas' ],
+   *  edit: [ 'drag-canvas', {
+   *    type: 'brush-select',
+   *    trigger: 'ctrl'
+   *  }]
+   * }
+   *
+   * @private
+   * @type {IMode}
+   * @memberof Mode
+   */
+  public modes: IMode
+
+  /**
+   * mode = 'drag-node'
+   *
+   * @private
+   * @type {string}
+   * @memberof Mode
+   */
+  public mode: string
+  private currentBehaves: IBehavior[]
+  constructor(graph: IGraph) {
+    this.graph = graph
+    this.modes = graph.get('modes') || {
+      default: []
+    }
+    this.formatModes()
+
+    this.mode = graph.get('defaultMode') || 'default'
+    this.currentBehaves = []
+
+    this.setMode(this.mode)
+  }
+
+  private formatModes() {
+    const modes = this.modes;
+    each(modes, mode => {
+      each(mode, (behavior, i) => {
+        if (isString(behavior)) {
+          mode[i] = { type: behavior };
+        }
+      });
+    });
+  }
+
+  private setBehaviors(mode: string) {
+    const graph = this.graph;
+    const behaviors = this.modes[mode];
+    const behaves: IBehavior[] = [];
+    let behave: IBehavior;
+    each(behaviors, behavior => {
+      const BehaviorInstance = Behavior.getBehavior(behavior.type)
+      if (!BehaviorInstance) {
+        return;
+      }
+      behave = new BehaviorInstance(behavior);
+      if(behave) {
+        behave.bind(graph)
+        behaves.push(behave);
+      }
+    });
+    this.currentBehaves = behaves;
+  }
+
+  private mergeBehaviors(modeBehaviors: IModeType[], behaviors: IModeType[]): IModeType[] {
+    each(behaviors, behavior => {
+      if (modeBehaviors.indexOf(behavior) < 0) {
+        if (isString(behavior)) {
+          behavior = { type: behavior };
+        }
+        modeBehaviors.push(behavior);
+      }
+    });
+    return modeBehaviors;
+  }
+
+  private filterBehaviors(modeBehaviors: IModeType[], behaviors: IModeType[]): IModeType[] {
+    const result: IModeType[] = [];
+    modeBehaviors.forEach(behavior => {
+      let type: string = ''
+      if(isString(behavior)) {
+        type = behavior
+      } else {
+        type = behavior.type
+      }
+      if (behaviors.indexOf(type) < 0) {
+        result.push(behavior);
+      }
+    });
+    return result;
+  }
+
+  public setMode(mode: string): Mode {
+    const modes = this.modes;
+    const graph = this.graph;
+    const behaviors = modes[mode];
+    if (!behaviors) {
+      return;
+    }
+    graph.emit('beforemodechange', { mode });
+
+    each(this.currentBehaves, behave => {
+      behave.unbind(graph);
+    });
+
+    this.setBehaviors(mode);
+
+    graph.emit('aftermodechange', { mode });
+    this.mode = mode;
+
+    return this;
+  }
+
+  /**
+   * 动态增加或删除 Behavior
+   *
+   * @param {IModeType[]} behaviors
+   * @param {(IModeType[] | IModeType)} modes
+   * @param {boolean} isAdd
+   * @returns {Mode}
+   * @memberof Mode
+   */
+  public manipulateBehaviors(behaviors: IModeType[], modes: IModeType[] | IModeType, isAdd: boolean): Mode {
+    const self = this
+    if(!isArray(behaviors)) {
+      behaviors = [ behaviors ]
+    }
+
+    if(isArray(modes)) {
+      each(modes, mode => {
+        if (!self.modes[mode]) {
+          if (isAdd) {
+            self.modes[mode] = [].concat(behaviors);
+          }
+        } else {
+          if (isAdd) {
+            self.modes[mode] = this.mergeBehaviors(self.modes[mode], behaviors);
+          } else {
+            self.modes[mode] = this.filterBehaviors(self.modes[mode], behaviors);
+          }
+        }
+      })
+
+      return this
+    }
+
+    let currentMode: string = ''
+    if(!modes) {
+      currentMode = this.mode
+    }
+
+    if (isAdd) {
+      self.modes[currentMode] = this.mergeBehaviors(self.modes[currentMode], behaviors);
+    } else {
+      self.modes[currentMode] = this.filterBehaviors(self.modes[currentMode], behaviors);
+    }
+
+    self.setMode(this.mode)
+
+    return this
+  }
+
+}
\ No newline at end of file
diff --git a/src/graph/graph.ts b/src/graph/graph.ts
new file mode 100644
index 0000000000..b8bd225ed6
--- /dev/null
+++ b/src/graph/graph.ts
@@ -0,0 +1,13 @@
+import EventEmitter from '@antv/event-emitter'
+import { GraphOptions, IGraph } from '@g6/interface/graph';
+
+export default class Graph extends EventEmitter implements IGraph {
+  private _cfg: GraphOptions
+  constructor(cfg: GraphOptions) {
+    super()
+    this._cfg = cfg
+  }
+  public get(key: string) {
+    return this._cfg[key]
+  }
+}
\ No newline at end of file
diff --git a/src/graph/tree-graph.ts b/src/graph/tree-graph.ts
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/src/interface/behavior.ts b/src/interface/behavior.ts
index 95ce59692b..fa0cb36715 100644
--- a/src/interface/behavior.ts
+++ b/src/interface/behavior.ts
@@ -1,9 +1,19 @@
 
 import GraphEvent from '@antv/g-base/lib/event/graph-event';
-import { IG6GraphEvent } from "../../types";
+import { DefaultBehaviorType, G6Event, IG6GraphEvent } from '@g6/types';
+import { IGraph } from './graph';
 import { IItem } from './item';
 
-
+export interface IBehavior {
+  constructor: (cfg?: object) => void;
+  getEvents: () => { [key in G6Event]?: string };
+  shouldBegin: () => boolean;
+  shouldUpdate: () => boolean;
+  shouldEnd: () => boolean;
+  bind: (graph: IGraph) => void;
+  unbind: (graph: IGraph) => void;
+  [key: string]: (...args: DefaultBehaviorType[]) => unknown;
+}
 
 export class G6GraphEvent extends GraphEvent implements IG6GraphEvent {
   public item: IItem
diff --git a/src/interface/graph.ts b/src/interface/graph.ts
index 6305c1c39e..0000b41833 100644
--- a/src/interface/graph.ts
+++ b/src/interface/graph.ts
@@ -1,7 +1,147 @@
-import { G6Event } from '../../types'
+import EventEmitter from '@antv/event-emitter';
+import { Easeing, ModelStyle, ShapeStyle } from '@g6/types'
 
-export interface IGraph {
-  on: (event: G6Event, handler: () => void) => void;
-  off: (event: G6Event, handler: () => void) => void;
+export interface IModeOption {
+  type: string;
+}
+
+export type IModeType = string | IModeOption
+
+export interface IMode {
+  default: IModeType[]
+  [key: string]: IModeType[]
+}
+
+export interface ILayoutOptions {
+  type: string;
+}
+
+export interface GraphOptions {
+  /**
+   * 图的 DOM 容器，可以传入该 DOM 的 id 或者直接传入容器的 HTML 节点对象
+   */
+  container: string | HTMLElement;
+  /**
+   * 指定画布宽度，单位为 'px'
+   */
+  width: number;
+  /**
+   * 指定画布高度，单位为 'px'
+   */
+  height: number;
+  /**
+   * 渲染引擎，支持canvas和svg。
+   */
+  renderer?: 'canvas' | 'svg';
+
+  fitView?: boolean;
+
+  layout?: ILayoutOptions;
+
+  /**
+   * 图适应画布时，指定四周的留白。
+   * 可以是一个值, 例如：fitViewPadding: 20
+   * 也可以是一个数组，例如：fitViewPadding: [20, 40, 50,20]
+   * 当指定一个值时，四边的边距都相等，当指定数组时，数组内数值依次对应 上，右，下，左四边的边距。
+   */
+  fitViewPadding?: number[] | number;
+  /**
+   * 各种元素是否在一个分组内，决定节点和边的层级问题，默认情况下所有的节点在一个分组中，所有的边在一个分组中，当这个参数为 false 时，节点和边的层级根据生成的顺序确定。
+   * 默认值：true
+   */
+  groupByTypes?: boolean;
+
+  groupStyle?: {
+    style: {
+      [key: string]: ShapeStyle
+    };
+  };
+
+  /**
+   * 当图中元素更新，或视口变换时，是否自动重绘。建议在批量操作节点时关闭，以提高性能，完成批量操作后再打开，参见后面的 setAutoPaint() 方法。
+   * 默认值：true
+   */
+  autoPaint?: boolean;
+
+  /**
+   * 设置画布的模式。详情可见G6中的Mode文档。
+   */
+  modes?: IMode;
+
+  /**
+   * 默认状态下节点的配置，比如 shape, size, color。会被写入的 data 覆盖。
+   */
+  defaultNode?: {
+    shape?: string,
+    size?: string,
+    color?: string,
+  } & ModelStyle;
+
+  /**
+   * 默认状态下边的配置，比如 shape, size, color。会被写入的 data 覆盖。
+   */
+  defaultEdge?: {
+    shape?: string,
+    size?: string,
+    color?: string,
+  } & ModelStyle;
+
+  nodeStateStyles?: ModelStyle;
+
+  edgeStateStyles?: ModelStyle;
+
+  /**
+   * 向 graph 注册插件。插件机制请见：plugin
+   */
+  plugins?: any[];
+  /**
+   * 是否启用全局动画。
+   */
+  animate?: boolean;
+
+  /**
+   * 动画配置项，仅在animate为true时有效。
+   */
+  animateCfg?: {
+    /**
+     * 回调函数，用于自定义节点运动路径。
+     */
+    onFrame?: () => unknown;
+    /**
+     * 动画时长，单位为毫秒。
+     */
+    duration?: number;
+    /**
+     * 动画动效。
+     * 默认值：easeLinear
+     */
+    easing?: Easeing;
+  };
+  /**
+   * 最小缩放比例
+   * 默认值 0.2
+   */
+  minZoom?: number;
+  /**
+   * 最大缩放比例
+   * 默认值 10
+   */
+  maxZoom?: number;
+  /**
+   * 像素比率
+   * 默认值 1.0
+   */
+  pixelRatio?: number;
+
+  groupType?: string;
+
+  /**
+   * Edge 是否连接到节点中间
+   */
+  linkCenter?: boolean;
+}
+
+export interface IGraph extends EventEmitter {
+  get<T>(key: string): T;
 }
 
diff --git a/src/interface/item.ts b/src/interface/item.ts
index 0aa1fcdab5..86f1e813d0 100644
--- a/src/interface/item.ts
+++ b/src/interface/item.ts
@@ -1,10 +1,8 @@
 import Group from "@antv/g-canvas/lib/group";
-import ShapeBase from "@antv/g-canvas/lib/shape/base";
-import { BBox } from "@antv/g-canvas/lib/types";
-import { IModelConfig, INodeConfig, IPoint, IShapeStyle } from '../../types'
+import { IBBox, IPoint, IShapeBase, ModelConfig, NodeConfig, ShapeStyle } from '@g6/types'
 
 // item 的配置项
-interface IItemConfig {
+export type IItemConfig = Partial<{
   /**
    * id
    */
@@ -18,7 +16,7 @@ interface IItemConfig {
   /**
    * data model
    */
-  model: IModelConfig;
+  model: ModelConfig;
 
   /**
    * G Group
@@ -46,23 +44,23 @@ interface IItemConfig {
   /**
    * key shape to calculate item's bbox
    */
-  keyShape: ShapeBase,
+  keyShape: IShapeBase,
   /**
    * item's states, such as selected or active
    * @type Array
    */
   states: string[];
 
-}
+}>
 
 export interface IItem {
   _cfg: IItemConfig;
 
+  destroyed: boolean;
+
   isItem(): boolean;
 
-  getDefaultCfg(): IItemConfig;
-
-  getKeyShapeStyle(): IShapeStyle;
+  getKeyShapeStyle(): ShapeStyle;
 
   /**
    * 获取当前元素的所有状态
@@ -77,11 +75,11 @@ export interface IItem {
    */
   hasState(state: string): boolean;
 
-  getStateStyle(state: string): IShapeStyle;
+  getStateStyle(state: string): ShapeStyle;
 
-  getOriginStyle(): IShapeStyle;
+  getOriginStyle(): ShapeStyle;
 
-  getCurrentStatesStyle(): IShapeStyle;
+  getCurrentStatesStyle(): ShapeStyle;
 
   /**
    * 更改元素状态， visible 不属于这个范畴
@@ -103,13 +101,13 @@ export interface IItem {
    * 节点的关键形状，用于计算节点大小，连线截距等
    * @return {G.Shape} 关键形状
    */
-  getKeyShape(): ShapeBase;
+  getKeyShape(): IShapeBase;
 
   /**
    * 节点数据模型
    * @return {Object} 数据模型
    */
-  getModel(): IModelConfig;
+  getModel(): ModelConfig;
 
   /**
    * 节点类型
@@ -117,7 +115,7 @@ export interface IItem {
    */
   getType(): string;
 
-  getShapeCfg(model: IModelConfig): IModelConfig;
+  getShapeCfg(model: ModelConfig): ModelConfig;
 
   /**
    * 刷新一般用于处理几种情况
@@ -133,7 +131,7 @@ export interface IItem {
    * @internal 仅提供给 Graph 使用，外部直接调用 graph.update 接口
    * @param  {Object} cfg       配置项，可以是增量信息
    */
-  update(cfg: IModelConfig): void;
+  update(cfg: ModelConfig): void;
 
   /**
    * 更新元素内容，样式
@@ -144,12 +142,7 @@ export interface IItem {
    * 更新位置，避免整体重绘
    * @param {object} cfg 待更新数据
    */
-  updatePosition(cfg: INodeConfig): void;
-
-  /**
-   * 更新/刷新等操作后，清除 cache
-   */
-  clearCache(): void;
+  updatePosition(cfg: NodeConfig): void;
 
   /**
    * 绘制元素
@@ -159,7 +152,7 @@ export interface IItem {
   /**
    * 获取元素的包围盒
    */
-  getBBox(): BBox;
+  getBBox(): IBBox;
 
   /**
    * 将元素放到最前面
@@ -195,6 +188,8 @@ export interface IItem {
 
   isVisible(): boolean;
 
+  isOnlyMove(cfg: ModelConfig): boolean;
+
   get<T>(key: string): T;
   set<T>(key: string, value: T): void;
 }
@@ -252,11 +247,15 @@ export interface INode extends IItem {
    */
   removeEdge(edge: IEdge): void;
 
-  clearCache(): void;
-
   /**
    * 获取锚点的定义
    * @return {array} anchorPoints， {x,y,...cfg}
    */
   getAnchorPoints(): IPoint[];
+
+  hasLocked(): boolean;
+
+  lock(): void;
+
+  unlock(): void;
 }
\ No newline at end of file
diff --git a/src/item/edge.ts b/src/item/edge.ts
new file mode 100644
index 0000000000..92508c5e0d
--- /dev/null
+++ b/src/item/edge.ts
@@ -0,0 +1,217 @@
+import isNil from '@antv/util/lib/is-nil';
+import isPlainObject from '@antv/util/lib/is-plain-object'
+import { IEdge, INode } from "@g6/interface/item";
+import { EdgeConfig, IPoint, NodeConfig, SourceTarget } from '@g6/types';
+import Item from "./item";
+
+const END_MAP = { source: 'start', target: 'end' };
+const ITEM_NAME_SUFFIX = 'Node'; // 端点的后缀，如 sourceNode, targetNode
+const POINT_NAME_SUFFIX = 'Point'; // 起点或者结束点的后缀，如 startPoint, endPoint
+const ANCHOR_NAME_SUFFIX = 'Anchor';
+
+export default class Edge extends Item implements IEdge {
+  protected getDefaultCfg() {
+    return {
+      type: 'edge',
+      sourceNode: null,
+      targetNode: null,
+      startPoint: null,
+      endPoint: null,
+      linkCenter: false
+    }
+  }
+
+  private setEnd(name: string, value: INode) {
+    const pointName = END_MAP[name] + POINT_NAME_SUFFIX;
+    const itemName = name + ITEM_NAME_SUFFIX;
+    const preItem = this.get(itemName);
+    if(preItem) {
+      // 如果之前存在节点，则移除掉边
+      preItem.removeEdge(this)
+    }
+
+    if (isPlainObject(value)) { // 如果设置成具体的点，则清理节点
+      this.set(pointName, value);
+      this.set(itemName, null);
+    } else {
+      value!.addEdge(this);
+      this.set(itemName, value);
+      this.set(pointName, null);
+    }
+  }
+
+  /**
+   * 获取连接点的坐标
+   * @param name source | target
+   * @param model 边的数据模型
+   * @param controlPoints 控制点
+   */
+  private getLinkPoint(name: SourceTarget, model: EdgeConfig, controlPoints: IPoint[]): IPoint {
+    const pointName = END_MAP[name] + POINT_NAME_SUFFIX;
+    const itemName = name + ITEM_NAME_SUFFIX;
+    let point = this.get(pointName);
+    if (!point) {
+      const item = this.get(itemName);
+      const anchorName = name + ANCHOR_NAME_SUFFIX;
+      const prePoint = this.getPrePoint(name, controlPoints);
+      const anchorIndex = model[anchorName];
+      if (isNil(anchorIndex)) { // 如果有锚点，则使用锚点索引获取连接点
+        point = item.getLinkPointByAnchor(anchorIndex);
+      }
+      // 如果锚点没有对应的点或者没有锚点，则直接计算连接点
+      point = point || item.getLinkPoint(prePoint);
+      if (isNil(point.index)) {
+        this.set(name + 'AnchorIndex', point.index);
+      }
+    }
+    return point;
+  }
+
+  /**
+   * 获取同端点进行连接的点，计算交汇点
+   * @param name 
+   * @param controlPoints 
+   */
+  private getPrePoint(name: SourceTarget, controlPoints: IPoint[]): NodeConfig | IPoint {
+    if (controlPoints && controlPoints.length) {
+      const index = name === 'source' ? 0 : controlPoints.length - 1;
+      return controlPoints[index];
+    }
+    const oppositeName = name === 'source' ? 'target' : 'source'; // 取另一个节点的位置
+    return this.getEndPoint(oppositeName);
+  }
+
+  /**
+   * 获取端点的位置
+   * @param name 
+   */
+  private  getEndPoint(name: string): NodeConfig | IPoint {
+    const itemName = name + ITEM_NAME_SUFFIX;
+    const pointName = END_MAP[name] + POINT_NAME_SUFFIX;
+    const item = this.get(itemName);
+      // 如果有端点，直接使用 model
+    if (item) {
+      return item.get('model');
+    }  // 否则直接使用点
+    return this.get(pointName);
+  }
+
+  /**
+   * 通过端点的中心获取控制点
+   * @param model 
+   */
+  private getControlPointsByCenter(model) {
+    const sourcePoint = this.getEndPoint('source');
+    const targetPoint = this.getEndPoint('target');
+    const shapeFactory = this.get('shapeFactory');
+    return shapeFactory.getControlPoints(model.shape, {
+      startPoint: sourcePoint,
+      endPoint: targetPoint
+    });
+  }
+
+  private getEndCenter(name: string): IPoint {
+    const itemName = name + ITEM_NAME_SUFFIX;
+    const pointName = END_MAP[name] + POINT_NAME_SUFFIX;
+    const item = this.get(itemName);
+      // 如果有端点，直接使用 model
+    if (item) {
+      const bbox = item.getBBox();
+      return {
+        x: bbox.centerX,
+        y: bbox.centerY
+      };
+    }  // 否则直接使用点
+    return this.get(pointName);
+  }
+
+  protected init() {
+    super.init()
+  }
+
+  public getShapeCfg(model: EdgeConfig): EdgeConfig {
+    const self = this;
+    const linkCenter: boolean = self.get('linkCenter'); // 如果连接到中心，忽视锚点、忽视控制点
+    const cfg: any = super.getShapeCfg(model);
+    if (linkCenter) {
+      cfg.startPoint = self.getEndCenter('source');
+      cfg.endPoint = self.getEndCenter('target');
+    } else {
+      const controlPoints = cfg.controlPoints || self.getControlPointsByCenter(cfg);
+      cfg.startPoint = self.getLinkPoint('source', model, controlPoints);
+      cfg.endPoint = self.getLinkPoint('target', model, controlPoints);
+    }
+    cfg.sourceNode = self.get('sourceNode');
+    cfg.targetNode = self.get('targetNode');
+    return cfg;
+  }
+
+  /**
+   * 获取边的数据模型
+   */
+  public getModel(): EdgeConfig {
+    const model: EdgeConfig = this.get('model');
+    const out = Object.assign({}, model);
+    const sourceItem = this.get('source' + ITEM_NAME_SUFFIX);
+    const targetItem = this.get('target' + ITEM_NAME_SUFFIX);
+    if (sourceItem) {
+      out.source = sourceItem.get('id');
+      delete out['source' + ITEM_NAME_SUFFIX];
+    } else {
+      out.source = this.get('start' + POINT_NAME_SUFFIX);
+    }
+    if (targetItem) {
+      out.target = targetItem.get('id');
+      delete out['target' + ITEM_NAME_SUFFIX];
+    } else {
+      out.target = this.get('end' + POINT_NAME_SUFFIX);
+    }
+    return out;
+  }
+
+  public setSource(source: INode) {
+    this.setEnd('source', source)
+    this.set('source', source)
+  }
+
+  public setTarget(target: INode) {
+    this.setEnd('target', target)
+    this.set('target', target)
+  }
+
+  public getSource(): INode {
+    return this.get('source')
+  }
+
+  public getTarget(): INode {
+    return this.get('target')
+  }
+
+  public updatePosition() {}
+
+  /**
+   * 边不需要重计算容器位置，直接重新计算 path 位置
+   * @param {object} cfg 待更新数据
+   */
+  public update(cfg: EdgeConfig) {
+    const model: EdgeConfig = this.get('model');
+    Object.assign(model, cfg);
+    this.updateShape();
+    this.afterUpdate();
+    this.clearCache();
+  }
+
+  public destroy() {
+    const sourceItem: INode = this.get('source' + ITEM_NAME_SUFFIX);
+    const targetItem: INode = this.get('target' + ITEM_NAME_SUFFIX);
+    if(sourceItem && !sourceItem.destroyed) {
+      sourceItem.removeEdge(this)
+    }
+
+    if(targetItem && !targetItem.destroyed) {
+      targetItem.removeEdge(this);
+    }
+    super.destroy();
+  }
+
+}
\ No newline at end of file
diff --git a/src/item/item.ts b/src/item/item.ts
new file mode 100644
index 0000000000..ce874685df
--- /dev/null
+++ b/src/item/item.ts
@@ -0,0 +1,568 @@
+import Group from '@antv/g-canvas/lib/group';
+import each from '@antv/util/lib/each'
+import isNil from '@antv/util/lib/is-nil';
+import isPlainObject from '@antv/util/lib/is-plain-object'
+import isString from '@antv/util/lib/is-string'
+import uniqueId from '@antv/util/lib/unique-id'
+import { IItem, IItemConfig } from "@g6/interface/item";
+import { IBBox, IPoint, IShapeBase, ModelConfig, ModelStyle } from '@g6/types';
+import { getBBox } from '@g6/util/graphic';
+import { translate } from '@g6/util/math';
+
+const CACHE_BBOX = 'bboxCache';
+
+const RESERVED_STYLES = [ 'fillStyle', 'strokeStyle', 
+  'path', 'points', 'img', 'symbol' ];
+
+export default  class Item implements IItem {
+  public _cfg: IItemConfig = {}
+  private defaultCfg: IItemConfig = {
+    /**
+     * id
+     * @type {string}
+     */
+    id: null,
+
+    /**
+     * 类型
+     * @type {string}
+     */
+    type: 'item',
+
+    /**
+     * data model
+     * @type {object}
+     */
+    model: {} as ModelConfig,
+
+    /**
+     * g group
+     * @type {G.Group}
+     */
+    group: null,
+
+    /**
+     * is open animate
+     * @type {boolean}
+     */
+    animate: false,
+
+    /**
+     * visible - not group visible
+     * @type {boolean}
+     */
+    visible: true,
+
+    /**
+     * locked - lock node
+     * @type {boolean}
+     */
+    locked: false,
+    /**
+     * capture event
+     * @type {boolean}
+     */
+    event: true,
+    /**
+     * key shape to calculate item's bbox
+     * @type object
+     */
+    keyShape: null,
+    /**
+     * item's states, such as selected or active
+     * @type Array
+     */
+    states: []
+  };
+
+  public destroyed: boolean = false
+
+  constructor(cfg: IItemConfig) {
+    this._cfg = Object.assign(this.defaultCfg, this.getDefaultCfg(), cfg)
+    const group = cfg.group
+    group.set('item', this)
+
+    let id = this.get('model').id
+
+    if(!id) {
+      id = uniqueId(this.get('type'))
+    }
+
+    this.set('id', id)
+    group.set('id', id)
+
+    this.init()
+    this.draw()
+  }
+
+  /**
+   * 根据 keyshape 计算包围盒
+   */
+  private calculateBBox(): IBBox {
+    const keyShape: IShapeBase = this.get('keyShape');
+    const group: Group = this.get('group');
+    // 因为 group 可能会移动，所以必须通过父元素计算才能计算出正确的包围盒
+    const bbox = getBBox(keyShape, group);
+    bbox.x = bbox.minX;
+    bbox.y = bbox.minY;
+    bbox.width = bbox.maxX - bbox.minX;
+    bbox.height = bbox.maxY - bbox.minY;
+    bbox.centerX = (bbox.minX + bbox.maxX) / 2;
+    bbox.centerY = (bbox.minY + bbox.maxY) / 2;
+    return bbox;
+  }
+
+  /**
+   * draw shape
+   */
+  private drawInner() {
+    const self = this;
+    const shapeFactory = self.get('shapeFactory');
+    const group: Group = self.get('group');
+    const model: ModelConfig = self.get('model');
+    group.clear();
+
+    if (!shapeFactory) {
+      return;
+    }
+    self.updatePosition(model);
+    const cfg = self.getShapeCfg(model); // 可能会附加额外信息
+    const shapeType: string = cfg.shape;
+    const keyShape: IShapeBase = shapeFactory.draw(shapeType, cfg, group);
+    if (keyShape) {
+      keyShape.isKeyShape = true;
+      self.set('keyShape', keyShape);
+      self.set('originStyle', this.getKeyShapeStyle());
+    }
+    // 防止由于用户外部修改 model 中的 shape 导致 shape 不更新
+    this.set('currentShape', shapeType);
+    this.resetStates(shapeFactory, shapeType);
+  }
+
+  /**
+   * reset shape states
+   * @param shapeFactory 
+   * @param shapeType 
+   */
+  private resetStates(shapeFactory, shapeType: string) {
+    const self = this;
+    const states: string[] = self.get('states');
+    each(states, state => {
+      shapeFactory.setState(shapeType, state, true, self);
+    });
+  }
+
+  protected init() {
+    // TODO 实例化工厂方法，需要等 Shape 重构完成
+    // const shapeFactory = Shape.getFactory(this.get('type'));
+    // this.set('shapeFactory', shapeFactory);
+  }
+
+  /**
+   * 获取属性
+   * @internal 仅内部类使用
+   * @param  {String} key 属性名
+   * @return {object | string | number} 属性值
+   */
+  public get(key: string) {
+    return this._cfg[key]
+  }
+
+  /**
+   * 设置属性
+   * @internal 仅内部类使用
+   * @param {String|Object} key 属性名，也可以是对象
+   * @param {object | string | number} val 属性值
+   */
+  public set(key: string, val): void {
+    if(isPlainObject(key)) {
+      this._cfg = Object.assign({}, this._cfg, key)
+    } else {
+      this._cfg[key] = val
+    }
+  }
+
+  protected getDefaultCfg() {
+    return {}
+  }
+
+
+  /**
+   * 更新/刷新等操作后，清除 cache
+   */
+  protected clearCache() {
+    this.set(CACHE_BBOX, null);
+  }
+
+  /**
+   * 渲染前的逻辑，提供给子类复写
+   */
+  protected beforeDraw() {
+
+  }
+
+  /**
+   * 渲染后的逻辑，提供给子类复写
+   */
+  protected afterDraw() {
+
+  }
+
+  /**
+   * 更新后做一些工作
+   */
+  protected afterUpdate() {
+
+  }
+
+  /**
+   * draw shape
+   */
+  public draw() {
+    this.beforeDraw()
+    this.drawInner()
+    this.afterDraw()
+  }
+
+  public getKeyShapeStyle(): ModelStyle {
+    const keyShape = this.getKeyShape();
+    if (keyShape) {
+      const styles: ModelStyle = {};
+      each(keyShape.attr(), (val, key) => {
+        if (RESERVED_STYLES.indexOf(key) < 0) {
+          styles[key] = val;
+        }
+      });
+      return styles;
+    }
+  }
+
+  // TODO 确定还是否需要该方法
+  public getShapeCfg(model: ModelConfig): ModelConfig {
+    const styles = this.get('styles');
+    if (styles && styles.default) {
+      // merge graph的item样式与数据模型中的样式
+      const newModel = Object.assign({}, model);
+      newModel.style = Object.assign({}, styles.default, model.style);
+      return newModel;
+    }
+    return model;
+  }
+
+  /**
+   * 获取指定状态的样式，去除了全局样式
+   * @param state 状态名称
+   */
+  public getStateStyle(state: string) {
+    const type: string = this.getType()
+    const styles = this.get(`${type}StateStyles`);
+    const stateStyle = styles && styles[state];
+    return stateStyle;
+  }
+
+  /**
+   * get keyshape style
+   */
+  public getOriginStyle(): ModelStyle {
+    return this.get('originStyle');
+  }
+
+  public getCurrentStatesStyle(): ModelStyle {
+    const self = this;
+    const originStyle = self.getOriginStyle();
+    each(self.getStates(), state => {
+      Object.assign(originStyle, self.getStateStyle(state));
+    });
+    return originStyle;
+  }
+
+  /**
+   * 更改元素状态， visible 不属于这个范畴
+   * @internal 仅提供内部类 graph 使用
+   * @param {String} state 状态名
+   * @param {Boolean} enable 节点状态值
+   */
+  public setState(state: string, enable: boolean) {
+    const states: string[] = this.get('states');
+    const shapeFactory = this.get('shapeFactory');
+    const index = states.indexOf(state);
+    if (enable) {
+      if (index > -1) {
+        return;
+      }
+      states.push(state);
+    } else if (index > -1) {
+      states.splice(index, 1);
+    }
+
+    if (shapeFactory) {
+      const model: ModelConfig = this.get('model');
+      shapeFactory.setState(model.shape, state, enable, this);
+    }
+  }
+
+  // TODO 
+  public clearStates(states: string[]) {
+    const self = this;
+    const originStates = self.getStates();
+    const shapeFactory = self.get('shapeFactory');
+    const shape: string = self.get('model').shape;
+    if (!states) {
+      self.set('states', []);
+      shapeFactory.setState(shape, originStates[0], false, self);
+      return;
+    }
+    if (isString(states)) {
+      states = [ states ];
+    }
+    const newStates = originStates.filter(state => {
+      shapeFactory.setState(shape, state, false, self);
+      if (states.indexOf(state) >= 0) {
+        return false;
+      }
+      return true;
+    });
+    self.set('states', newStates);
+  }
+
+  /**
+   * 节点的图形容器
+   * @return {G.Group} 图形容器
+   */
+  public getContainer(): Group {
+    return this.get('group');
+  }
+
+  /**
+   * 节点的关键形状，用于计算节点大小，连线截距等
+   * @return {G.Shape} 关键形状
+   */
+  public getKeyShape(): IShapeBase {
+    return this.get('keyShape');
+  }
+
+  /**
+   * 节点数据模型
+   * @return {Object} 数据模型
+   */
+  public getModel(): ModelConfig {
+    return this.get('model');
+  }
+
+  /**
+   * 节点类型
+   * @return {string} 节点的类型
+   */
+  public getType(): string {
+    return this.get('type');
+  }
+
+  /**
+   * 是否是 Item 对象，悬空边情况下进行判定
+   */
+  public isItem(): boolean {
+    return true
+  }
+  
+  /**
+   * 获取当前元素的所有状态
+   * @return {Array} 元素的所有状态
+   */
+  public getStates(): string[] {
+    return this.get('states');
+  }
+
+  /**
+   * 当前元素是否处于某状态
+   * @param {String} state 状态名
+   * @return {Boolean} 是否处于某状态
+   */
+  public hasState(state: string): boolean {
+    const states = this.getStates()
+    return states.indexOf(state) >= 0;
+  }
+
+  /**
+   * 刷新一般用于处理几种情况
+   * 1. item model 在外部被改变
+   * 2. 边的节点位置发生改变，需要重新计算边
+   *
+   * 因为数据从外部被修改无法判断一些属性是否被修改，直接走位置和 shape 的更新
+   */
+  public refresh() {
+    const model: ModelConfig = this.get('model');
+    // 更新元素位置
+    this.updatePosition(model);
+    // 更新元素内容，样式
+    this.updateShape();
+    // 做一些更新之后的操作
+    this.afterUpdate();
+    // 清除缓存
+    this.clearCache();
+  }
+
+  public isOnlyMove(cfg?: ModelConfig): boolean {
+    return false
+  }
+
+  /**
+   * 将更新应用到 model 上，刷新属性
+   * @internal 仅提供给 Graph 使用，外部直接调用 graph.update 接口
+   * @param  {Object} cfg       配置项，可以是增量信息
+   */
+  public update(cfg: ModelConfig) {
+    const model: ModelConfig = this.get('model');
+    const originPosition: IPoint = { x: model.x, y: model.y };
+
+    // 直接将更新合到原数据模型上，可以保证用户在外部修改源数据然后刷新时的样式符合期待。
+    Object.assign(model, cfg);
+    
+    // isOnlyMove 仅用于node
+    const onlyMove = this.isOnlyMove(cfg);
+    // 仅仅移动位置时，既不更新，也不重绘
+    if (onlyMove) {
+      this.updatePosition(model);
+    } else {
+      // 如果 x,y 有变化，先重置位置
+      if (originPosition.x !== model.x || originPosition.y !== model.y) {
+        this.updatePosition(model);
+      }
+      this.updateShape();
+    }
+    this.afterUpdate();
+    this.clearCache();
+  }
+
+  /**
+   * 更新元素内容，样式
+   */
+  public updateShape() {
+    const shapeFactory = this.get('shapeFactory');
+    const model = this.get('model');
+    const shape = model.shape;
+    // 判定是否允许更新
+    // 1. 注册的节点允许更新
+    // 2. 更新后的 shape 等于原先的 shape
+    if (shapeFactory.shouldUpdate(shape) && shape === this.get('currentShape')) {
+      const updateCfg = this.getShapeCfg(model);
+      shapeFactory.update(shape, updateCfg, this);
+    } else {
+      // 如果不满足上面两种状态，重新绘制
+      this.draw();
+    }
+    this.set('originStyle', this.getKeyShapeStyle());
+    // 更新后重置节点状态
+    this.resetStates(shapeFactory, shape);
+  }
+
+  /**
+   * 更新位置，避免整体重绘
+   * @param {object} cfg 待更新数据
+   */
+  public updatePosition(cfg: ModelConfig) {
+    const model: ModelConfig = this.get('model');
+
+    const x = isNil(cfg.x) ? model.x : cfg.x;
+    const y = isNil(cfg.y) ? model.y : cfg.y;
+
+    const group: Group = this.get('group');
+
+    if (isNil(x) || isNil(y)) {
+      return;
+    }
+    group.resetMatrix();
+    // G 4.0 element 中移除了矩阵相关方法，详见https://www.yuque.com/antv/blog/kxzk9g#4rMMV
+    translate(group, { x, y });
+    model.x = x;
+    model.y = y;
+    this.clearCache();     // 位置更新后需要清除缓存
+  }
+
+  /**
+   * 获取元素的包围盒
+   * @return {Object} 包含 x,y,width,height, centerX, centerY
+   */
+  public getBBox(): IBBox {
+    // 计算 bbox 开销有些大，缓存
+    let bbox: IBBox = this.get(CACHE_BBOX);
+    if (!bbox) {
+      bbox = this.calculateBBox();
+      this.set(CACHE_BBOX, bbox);
+    }
+    return bbox;
+  }
+
+  /**
+   * 将元素放到最前面
+   */
+  public toFront() {
+    this.get('group').toFront();
+  }
+
+  /**
+   * 将元素放到最后面
+   */
+  public toBack() {
+    this.get('group').toBack();
+  }
+
+  /**
+   * 显示元素
+   */
+  public show() {
+    this.changeVisibility(true);
+  }
+
+  /**
+   * 隐藏元素
+   */
+  public hide() {
+    this.changeVisibility(false);
+  }
+
+  /**
+   * 更改是否显示
+   * @param  {Boolean} visible 是否显示
+   */
+  public changeVisibility(visible: boolean) {
+    const group: Group = this.get('group');
+    if (visible) {
+      group.show();
+    } else {
+      group.hide();
+    }
+    this.set('visible', visible);
+  }
+
+  /**
+   * 元素是否可见
+   */
+  public isVisible(): boolean {
+    return this.get('visible');
+  }
+
+  /**
+   * 是否拾取及出发该元素的交互事件
+   * @param {Boolean} enable 标识位
+   */
+  public enableCapture(enable: boolean) {
+    const group: Group = this.get('group');
+    if(group) {
+      group.attr('capture', enable)
+    }
+  }
+
+  public destroy() {
+    if(!this.destroyed) {
+      const animate = this.get('animate');
+      const group: Group = this.get('group');
+      if (animate) {
+        group.stopAnimate();
+      }
+      group.remove();
+      this._cfg = null;
+      this.destroyed = true;
+    }
+  }
+
+}
\ No newline at end of file
diff --git a/src/item/node.ts b/src/item/node.ts
new file mode 100644
index 0000000000..773f8afe5a
--- /dev/null
+++ b/src/item/node.ts
@@ -0,0 +1,205 @@
+import each from '@antv/util/lib/each'
+import isNil from '@antv/util/lib/is-nil';
+import mix from '@antv/util/lib/mix'
+import { IEdge, INode } from '@g6/interface/item';
+import { IPoint, IShapeBase, NodeConfig } from '@g6/types';
+import { distance, getCircleIntersectByPoint, getEllispeIntersectByPoint, getRectIntersectByPoint } from '@g6/util/math';
+import Item from './item'
+
+const CACHE_ANCHOR_POINTS = 'anchorPointsCache'
+const CACHE_BBOX = 'bboxCache'
+
+export default class Node extends Item implements INode {
+  private getNearestPoint(points: IPoint[], curPoint: IPoint): IPoint {
+    let index = 0;
+    let nearestPoint = points[0];
+    let minDistance = distance(points[0], curPoint);
+    for (let i = 0; i < points.length; i++) {
+      const point = points[i];
+      const dis = distance(point, curPoint);
+      if (dis < minDistance) {
+        nearestPoint = point;
+        minDistance = dis;
+        index = i;
+      }
+    }
+    nearestPoint.anchorIndex = index;
+    return nearestPoint;
+  }
+  public getDefaultCfg() {
+    return {
+      type: 'node',
+      edges: []
+    }
+  }
+
+  /**
+   * 获取从节点关联的所有边
+   */
+  public getEdges(): IEdge[] {
+    return this.get('edges')
+  }
+
+  /**
+   * 获取所有的入边
+   */
+  public getInEdges(): IEdge[] {
+    const self = this;
+    return this.get('edges').filter((edge: IEdge) => {
+      return edge.get('target') === self;
+    });
+  }
+
+  /**
+   * 获取所有的出边
+   */
+  public getOutEdges(): IEdge[] {
+    const self = this;
+    return this.get('edges').filter((edge: IEdge) => {
+      return edge.get('source') === self;
+    });
+  }
+
+  /**
+   * 根据锚点的索引获取连接点
+   * @param  {Number} index 索引
+   */
+  public getLinkPointByAnchor(index): IPoint {
+    const anchorPoints = this.getAnchorPoints();
+    return anchorPoints[index];
+  }
+
+  /**
+   * 获取连接点
+   * @param point 
+   */
+  public getLinkPoint(point: IPoint): IPoint {
+    const keyShape: IShapeBase = this.get('keyShape');
+    const type: string = keyShape.get('type');
+    const bbox = this.getBBox();
+    const { centerX, centerY } = bbox;
+    const anchorPoints = this.getAnchorPoints();
+    let intersectPoint: IPoint;
+    switch (type) {
+      case 'circle':
+        intersectPoint = getCircleIntersectByPoint({
+          x: centerX,
+          y: centerY,
+          r: bbox.width / 2
+        }, point);
+        break;
+      case 'ellipse':
+        intersectPoint = getEllispeIntersectByPoint({
+          x: centerX,
+          y: centerY,
+          rx: bbox.width / 2,
+          ry: bbox.height / 2
+        }, point);
+        break;
+      default:
+        intersectPoint = getRectIntersectByPoint(bbox, point);
+    }
+    let linkPoint = intersectPoint;
+    // 如果存在锚点，则使用交点计算最近的锚点
+    if (anchorPoints.length) {
+      if (!linkPoint) { // 如果计算不出交点
+        linkPoint = point;
+      }
+      linkPoint = this.getNearestPoint(anchorPoints, linkPoint);
+    }
+    if (!linkPoint) { // 如果最终依然没法找到锚点和连接点，直接返回中心点
+      linkPoint = { x: centerX, y: centerY };
+    }
+    return linkPoint;
+  }
+
+  /**
+   * 获取锚点的定义
+   * @return {array} anchorPoints
+   */
+  public getAnchorPoints(): IPoint[] {
+    let anchorPoints: IPoint[] = this.get(CACHE_ANCHOR_POINTS);
+    if (!anchorPoints) {
+      anchorPoints = [];
+      const shapeFactory = this.get('shapeFactory');
+      const bbox = this.getBBox();
+      const model: NodeConfig = this.get('model');
+      const shapeCfg = this.getShapeCfg(model);
+      const points = shapeFactory.getAnchorPoints(model.shape, shapeCfg) || [];
+      each(points, (pointArr, index) => {
+        const point = mix({
+          x: bbox.minX + pointArr[0] * bbox.width,
+          y: bbox.minY + pointArr[1] * bbox.height
+        }, pointArr[2], {
+          index
+        });
+        anchorPoints.push(point);
+      });
+      this.set(CACHE_ANCHOR_POINTS, anchorPoints);
+    }
+    return anchorPoints;
+  }
+
+  /**
+   * add edge
+   * @param edge Edge instance
+   */
+  public addEdge(edge: IEdge) {
+    this.get('edges').push(edge)
+  }
+
+  /**
+   * 锁定节点
+   */
+  public lock() {
+    this.set('locked', true);
+  }
+
+  /**
+   * 解锁锁定的节点
+   */
+  public unlock() {
+    this.set('locked', false);
+  }
+
+  public hasLocked(): boolean {
+    return this.get('locked');
+  }
+
+  /**
+   * 移除边
+   * @param {Edge} edge 边
+   */
+  public removeEdge(edge: IEdge) {
+    const edges = this.getEdges();
+    const index = edges.indexOf(edge);
+    if (index > -1) {
+      edges.splice(index, 1);
+    }
+  }
+
+  public clearCache() {
+    this.set(CACHE_BBOX, null); // 清理缓存的 bbox
+    this.set(CACHE_ANCHOR_POINTS, null);
+  }
+
+  /**
+   * 是否仅仅移动节点，其他属性没变化
+   * @param cfg 节点数据模型
+   */
+  public isOnlyMove(cfg: NodeConfig): boolean {
+    if(!cfg) {
+      return false
+    }
+
+    const existX = isNil(cfg.x)
+    const existY = isNil(cfg.y)
+
+    const keys = Object.keys(cfg)
+
+    // 仅有一个字段，包含 x 或者 包含 y
+    // 两个字段，同时有 x，同时有 y
+    return (keys.length === 1 && (existX || existY))
+      || (keys.length === 2 && existX && existY)
+  }
+}
\ No newline at end of file
diff --git a/src/util/base.ts b/src/util/base.ts
index 6fdea87640..f52517f3be 100644
--- a/src/util/base.ts
+++ b/src/util/base.ts
@@ -1,17 +1,16 @@
-import GraphEvent from '@antv/g-base/lib/event/graph-event'
 import isArray from '@antv/util/lib/is-array'
 import isNil from '@antv/util/lib/is-nil'
 import isNumber from "@antv/util/lib/is-number";
 import isString from '@antv/util/lib/is-string'
-import { IG6GraphEvent, IPadding } from "../../types";
-import { G6GraphEvent } from '../interface/behavior';
+import { G6GraphEvent } from '@g6/interface/behavior';
+import { IG6GraphEvent, Padding } from '@g6/types';
 
 /**
  * turn padding into [top, right, bottom, right]
  * @param  {Number|Array} padding input padding
  * @return {array} output
  */
-export const formatPadding = (padding: IPadding): number[] => {
+export const formatPadding = (padding: Padding): number[] => {
   let top = 0;
   let left = 0;
   let right = 0;
diff --git a/src/util/graphic.ts b/src/util/graphic.ts
index 4b33e8b2d5..583ce3925d 100644
--- a/src/util/graphic.ts
+++ b/src/util/graphic.ts
@@ -1,11 +1,9 @@
 import Group from "@antv/g-canvas/lib/group";
-import ShapeBase from "@antv/g-canvas/lib/shape/base";
-import { BBox } from "@antv/g-canvas/lib/types";
 import { vec2 } from "@antv/matrix-util";
 import each from '@antv/util/lib/each'
-import { IEdgeConfig, IPoint, ITreeGraphData } from "../../types";
-import Global from '../global'
-import { INode } from "../interface/item";
+import Global from '@g6/global'
+import { INode } from "@g6/interface/item";
+import { EdgeConfig, IBBox, IPoint, IShapeBase, TreeGraphData } from '@g6/types';
 import { applyMatrix } from "./math";
 
 const PI: number =  Math.PI
@@ -16,7 +14,7 @@ const cos: (x: number) => number = Math.cos
 const SELF_LINK_SIN: number = sin(PI / 8);
 const SELF_LINK_COS: number = cos(PI / 8); 
 
-export const getBBox = (element: ShapeBase, group: Group): BBox => {
+export const getBBox = (element: IShapeBase, group: Group): IBBox => {
   const bbox = element.getBBox();
   let leftTop: IPoint = {
     x: bbox.minX,
@@ -52,13 +50,13 @@ export const getBBox = (element: ShapeBase, group: Group): BBox => {
  * get loop edge config
  * @param cfg edge config
  */
-export const getLoopCfgs = (cfg: IEdgeConfig): IEdgeConfig => {
+export const getLoopCfgs = (cfg: EdgeConfig): EdgeConfig => {
   const item: INode = cfg.sourceNode || cfg.targetNode
   const container: Group = item.get('group')
   const containerMatrix = container.getMatrix()
 
-  const keyShape: ShapeBase = item.getKeyShape()
-  const bbox: BBox = keyShape.getBBox()
+  const keyShape: IShapeBase = item.getKeyShape()
+  const bbox: IBBox = keyShape.getBBox()
 
   const loopCfg = cfg.loopCfg || {}
   // 距离keyShape边的最高距离
@@ -269,7 +267,7 @@ export const getLoopCfgs = (cfg: IEdgeConfig): IEdgeConfig => {
 //   return result;
 // }
 
-const traverse = (data: ITreeGraphData, fn: (param: ITreeGraphData) => boolean) => {
+const traverse = (data: TreeGraphData, fn: (param: TreeGraphData) => boolean) => {
   if(!fn(data)) {
     return
   }
@@ -278,7 +276,7 @@ const traverse = (data: ITreeGraphData, fn: (param: ITreeGraphData) => boolean)
   })
 }
 
-export const traverseTree = (data: ITreeGraphData, fn: (param: ITreeGraphData) => boolean) => {
+export const traverseTree = (data: TreeGraphData, fn: (param: TreeGraphData) => boolean) => {
   if(typeof fn !== 'function') {
     return
   }
@@ -290,7 +288,7 @@ export const traverseTree = (data: ITreeGraphData, fn: (param: ITreeGraphData) =
  * @param data Tree graph data
  * @param layout 
  */
-export const radialLayout = (data: ITreeGraphData, layout?: string): ITreeGraphData => {
+export const radialLayout = (data: TreeGraphData, layout?: string): TreeGraphData => {
   // 布局方式有 H / V / LR / RL / TB / BT
   const VERTICAL_LAYOUTS: string[] = [ 'V', 'TB', 'BT' ];
   const min: IPoint = {
diff --git a/src/util/group.ts b/src/util/group.ts
index be9f48da2a..63d6151587 100644
--- a/src/util/group.ts
+++ b/src/util/group.ts
@@ -1,9 +1,9 @@
 import groupBy, { ObjectType } from '@antv/util/lib/group-by'
-import { IGraphData, IGroupConfig, IGroupNodeIds } from '../../types';
+import { GraphData, GroupConfig, GroupNodeIds } from '@g6/types';
 
-export const getAllNodeInGroups = (data: IGraphData): IGroupNodeIds => {
-  const groupById: ObjectType<IGroupConfig> = groupBy(data.groups, 'id');
-  const groupByParentId: ObjectType<IGroupConfig> = groupBy(data.groups, 'parentId');
+export const getAllNodeInGroups = (data: GraphData): GroupNodeIds => {
+  const groupById: ObjectType<GroupConfig> = groupBy(data.groups, 'id');
+  const groupByParentId: ObjectType<GroupConfig> = groupBy(data.groups, 'parentId');
 
   const result = {};
   for (const parentId in groupByParentId) {
@@ -39,7 +39,7 @@ export const getAllNodeInGroups = (data: IGraphData): IGroupNodeIds => {
   }
 
   // 缓存所有groupID对应的Node
-  const groupNodes: IGroupNodeIds = {} as IGroupNodeIds;
+  const groupNodes: GroupNodeIds = {} as GroupNodeIds;
   for (const groupId in groupIds) {
     if (!groupId || groupId === 'undefined') {
       continue;
diff --git a/src/util/math.ts b/src/util/math.ts
index 352951f0bb..3ddad9e738 100644
--- a/src/util/math.ts
+++ b/src/util/math.ts
@@ -1,5 +1,7 @@
+import Group from '@antv/g-canvas/lib/group';
 import { mat3, vec3 } from '@antv/matrix-util'
-import { ICircle, IEllipse, IGraphData, IMatrix, IPoint, IRect } from '../../types'
+import { transform } from '@antv/matrix-util'
+import { GraphData, ICircle, IEllipse, IMatrix, IPoint, IRect } from '@g6/types'
 
 /**
  * 是否在区间内
@@ -271,7 +273,7 @@ export const floydWarshall = (adjMatrix: IMatrix[]): IMatrix[] => {
  * @param data graph data
  * @param directed whether it's a directed graph
  */
-export const getAdjMatrix = (data: IGraphData, directed: boolean): IMatrix[] => {
+export const getAdjMatrix = (data: GraphData, directed: boolean): IMatrix[] => {
   const nodes = data.nodes;
   const edges = data.edges;
   const matrix: IMatrix[] = [];
@@ -294,4 +296,16 @@ export const getAdjMatrix = (data: IGraphData, directed: boolean): IMatrix[] =>
     }
   });
   return matrix;
+}
+
+/**
+ * 平移group
+ * @param group Group 实例
+ * @param point 坐标
+ */
+export const translate = (group: Group, point: IPoint) => {
+  const matrix: IMatrix = group.getMatrix()
+  transform(matrix, [
+    [ 't',  point.x, point.y ]
+  ])
 }
\ No newline at end of file
diff --git a/src/util/path.ts b/src/util/path.ts
index 90c5fe91c8..4fb00c576f 100644
--- a/src/util/path.ts
+++ b/src/util/path.ts
@@ -1,6 +1,6 @@
 import { vec2 } from '@antv/matrix-util'
 import { catmullRom2Bezier } from '@antv/path-util'
-import { IPoint } from '../../types'
+import { IPoint } from '@g6/types'
 
 /**
  * 替换字符串中的字段
diff --git a/tests/unit/behavior/index-spec.ts b/tests/unit/behavior/index-spec.ts
index 430176489c..5081c69f9a 100644
--- a/tests/unit/behavior/index-spec.ts
+++ b/tests/unit/behavior/index-spec.ts
@@ -1,6 +1,6 @@
 import '../../../src/behavior'
 import Behavior from '../../../src/behavior/behavior'
-import { IBehavior } from '../../../types';
+import { IBehavior } from '../../../src/interface/behavior';
 
 describe('Behavior', () => {
   it('register signle behavior', () => {
diff --git a/tests/unit/graph/controller/mode-spec.ts b/tests/unit/graph/controller/mode-spec.ts
new file mode 100644
index 0000000000..7cb5729370
--- /dev/null
+++ b/tests/unit/graph/controller/mode-spec.ts
@@ -0,0 +1,19 @@
+import { Mode } from '../../../../src/graph/controller'
+import Graph from '../../../../src/graph/graph'
+import { GraphOptions, IGraph } from '../../../../src/interface/graph';
+
+describe('Mode Controller', () => {
+  it('signle mode', () => {
+    const cfg: GraphOptions = {
+      container: 'x',
+      width: 200,
+      height: 100
+    }
+    const graph: IGraph = new Graph(cfg)
+    const modeController = new Mode(graph)
+    expect(Object.keys(modeController.modes).length).toBe(1);
+    expect(modeController.modes.default).not.toBe(undefined);
+    expect(modeController.modes.default.length).toBe(0);
+    expect(modeController.mode).toBe('default');
+  })
+})
\ No newline at end of file
diff --git a/tsconfig.json b/tsconfig.json
index 2928f61ef9..8820b438c5 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -11,7 +11,12 @@
     "resolveJsonModule": true,
     "esModuleInterop": true,
     "lib": ["esnext", "dom"],
-    "types": ["jest"]
+    "types": ["jest"],
+    "baseUrl": ".",
+    "paths": {
+      "@g6/*": ["./src/*"],
+      "@g6/types": ["./types"]
+    }
   },
   "include": ["src"],
   "typedocOptions": {
diff --git a/types/index.ts b/types/index.ts
index 82b8c84723..747d18a717 100644
--- a/types/index.ts
+++ b/types/index.ts
@@ -1,17 +1,28 @@
 import GraphEvent from '@antv/g-base/lib/event/graph-event';
+import { BBox } from '@antv/g-base/lib/types';
+import ShapeBase from '@antv/g-canvas/lib/shape/base';
 import { IGraph } from '../src/interface/graph';
 import { IItem, INode } from '../src/interface/item'
 
+// Math types
 export interface IPoint {
   x: number;
   y: number;
+  // 获取连接点时使用
+  anchorIndex?: number;
 }
 
 export type IMatrix = number[];
 
-export type IPadding = number | string | number[];
+export interface IBBox extends BBox {
+  centerX?: number;
+  centerY?: number;
+}
 
-export type IShapeStyle = Partial<{
+export type Padding = number | string | number[];
+
+// Shape types
+export type ShapeStyle = Partial<{
   x: number;
   y: number;
   r: number;
@@ -27,6 +38,10 @@ export type IShapeStyle = Partial<{
   [key: string]: string | number | object | object[]
 }>
 
+export interface IShapeBase extends ShapeBase {
+  isKeyShape: boolean;
+}
+
 export interface IRect extends IPoint {
   width: number;
   height: number;
@@ -41,12 +56,15 @@ export interface IEllipse extends IPoint {
   ry: number;
 }
 
-type IModelStyle = Partial<{
+export type SourceTarget = 'source' | 'target'
+
+// model types (node edge group)
+export type ModelStyle = Partial<{
   style: {
-    [key: string]: IShapeStyle
+    [key: string]: ShapeStyle
   };
   stateStyles: {
-    [key: string]: IShapeStyle;
+    [key: string]: ShapeStyle;
   };
   // loop edge config
   loopCfg: {
@@ -56,37 +74,35 @@ type IModelStyle = Partial<{
     clockwise?: boolean;
   };
 }>
-interface IModelStyle1 {
-  style?: {
-    [key: string]: IShapeStyle
-  };
-  stateStyles?: {
-    [key: string]: IShapeStyle;
-  };
-  // loop edge config
-  loopCfg?: {
-    dist?: number;
-    position?: string;
-    // 如果逆时针画，交换起点和终点
-    clockwise?: boolean;
-  }
-}
 
-export type IModelConfig = INodeConfig | IEdgeConfig
+export type Easeing =
+  'easeLinear'
+    | 'easePolyIn'
+    | 'easePolyOut'
+    | 'easePolyInOut'
+    | 'easeQuad'
+    | 'easeQuadIn'
+    | 'easeQuadOut'
+    | 'easeQuadInOut'
+    | string
 
-export interface INodeConfig extends IModelStyle {
-  id: string;
+
+export interface ModelConfig extends ModelStyle {
+  shape?: string;
   label?: string;
-  groupId?: string;
-  description?: string;
   x?: number;
   y?: number;
 }
+export interface NodeConfig extends ModelConfig {
+  id: string;
+  groupId?: string;
+  description?: string;
+}
 
-export interface IEdgeConfig extends IModelStyle  {
+export interface EdgeConfig extends ModelConfig  {
+  id?: string;
   source: string;
   target: string;
-  label?: string;
   sourceNode?: INode;
   targetNode?: INode;
   startPoint?: IPoint;
@@ -94,28 +110,28 @@ export interface IEdgeConfig extends IModelStyle  {
   controlPoints?: IPoint[];
 }
 
-export interface IGroupConfig {
+export interface GroupConfig {
   id: string;
   parentId?: string;
-  [key: string]: string | IModelStyle;
+  [key: string]: string | ModelStyle;
 }
 
-export interface IGroupNodeIds {
+export interface GroupNodeIds {
   [key: string]: string[];
 }
 
-export interface IGraphData {
-  nodes?: INodeConfig[];
-  edges?: IEdgeConfig[];
-  groups?: IGroupConfig[];
+export interface GraphData {
+  nodes?: NodeConfig[];
+  edges?: EdgeConfig[];
+  groups?: GroupConfig[];
 }
 
-export interface ITreeGraphData {
+export interface TreeGraphData {
   id: string;
   label?: string;
   x?: number;
   y?: number;
-  children?: ITreeGraphData[];
+  children?: TreeGraphData[];
 }
 
 // Behavior type file
@@ -160,12 +176,12 @@ type Unbind = 'unbind'
 
 export type DefaultBehaviorType = IG6GraphEvent | string | number | object
 
-export type IBehaviorOpation<U> = {
+export type BehaviorOpation<U> = {
   [T in keyof U]:
   T extends GetEvents ? () => { [key in G6Event]?: string } :
-  T extends ShouldBegin ? (cfg?: IModelConfig) => boolean :
-  T extends ShouldEnd ? (cfg?: IModelConfig) => boolean :
-  T extends ShouldUpdate ? (cfg?: IModelConfig) => boolean :
+  T extends ShouldBegin ? (cfg?: ModelConfig) => boolean :
+  T extends ShouldEnd ? (cfg?: ModelConfig) => boolean :
+  T extends ShouldUpdate ? (cfg?: ModelConfig) => boolean :
   T extends Bind ? (graph: IGraph) => void :
   T extends Unbind ? (graph: IGraph) => void :
   (...args: DefaultBehaviorType[]) => unknown;
@@ -176,14 +192,3 @@ export type IEvent = Record<G6Event, string>
 export interface IG6GraphEvent extends GraphEvent {
   item: IItem;
 }
-
-export interface IBehavior {
-  constructor: (cfg?: object) => void;
-  getEvents: () => { [key in G6Event]?: string };
-  shouldBegin: () => boolean;
-  shouldUpdate: () => boolean;
-  shouldEnd: () => boolean;
-  bind: (graph: IGraph) => void;
-  unbind: (graph: IGraph) => void;
-  [key: string]: (...args: DefaultBehaviorType[]) => unknown;
-}
\ No newline at end of file