diff --git a/builder/exector/monitor.go b/builder/monitor/monitor.go
similarity index 93%
rename from builder/exector/monitor.go
rename to builder/monitor/monitor.go
index 451697f2f..eaf9e9b77 100644
--- a/builder/exector/monitor.go
+++ b/builder/monitor/monitor.go
@@ -1,8 +1,9 @@
-package exector
+package monitor
 
 import (
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/goodrain/rainbond/builder/discover"
+	"github.com/goodrain/rainbond/builder/exector"
 )
 
 // Metric name parts.
@@ -78,6 +79,6 @@ func (e *Exporter) scrape(ch chan<- prometheus.Metric) {
 	}
 
 	ch <- prometheus.MustNewConstMetric(e.healthStatus.Desc(), prometheus.GaugeValue, val)
-	ch <- prometheus.MustNewConstMetric(e.taskNum.Desc(), prometheus.GaugeValue, TaskNum)
-	ch <- prometheus.MustNewConstMetric(e.taskError.Desc(), prometheus.GaugeValue, ErrorNum)
+	ch <- prometheus.MustNewConstMetric(e.taskNum.Desc(), prometheus.GaugeValue, exector.TaskNum)
+	ch <- prometheus.MustNewConstMetric(e.taskError.Desc(), prometheus.GaugeValue, exector.ErrorNum)
 }
diff --git a/cmd/builder/server/server.go b/cmd/builder/server/server.go
index 8b00f66e6..f55b3d9ea 100644
--- a/cmd/builder/server/server.go
+++ b/cmd/builder/server/server.go
@@ -25,6 +25,7 @@ import (
 
 	"github.com/goodrain/rainbond/builder/discover"
 	"github.com/goodrain/rainbond/builder/exector"
+	"github.com/goodrain/rainbond/builder/monitor"
 	"github.com/goodrain/rainbond/cmd/builder/option"
 	"github.com/goodrain/rainbond/db"
 	"github.com/goodrain/rainbond/db/config"
@@ -82,7 +83,7 @@ func Run(s *option.Builder) error {
 	}
 	defer cle.Stop()
 
-	exporter := exector.NewExporter()
+	exporter := monitor.NewExporter()
 	prometheus.MustRegister(exporter)
 	r := api.APIServer()
 	r.Handle(s.Config.PrometheusMetricPath, promhttp.Handler())