diff --git a/.gitignore b/.gitignore
index 8848a52..9152893 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,4 +5,7 @@
 **/goc.log
 
 # binary
-goc
\ No newline at end of file
+goc
+
+# the temp file to save service address
+_svrs_address.txt
\ No newline at end of file
diff --git a/cmd/cover.go b/cmd/cover.go
index 1d583c5..44ddfb3 100644
--- a/cmd/cover.go
+++ b/cmd/cover.go
@@ -55,10 +55,6 @@ func doCover(cmd *cobra.Command, args []string, newgopath string, newtarget stri
 		log.Fatalf("target directory %s not exist", target)
 	}
 
-	//
-	//
-
-	//
 	listArgs := []string{"list", "-json"}
 	if len(args) != 0 {
 		listArgs = append(listArgs, args...)
@@ -66,12 +62,9 @@ func doCover(cmd *cobra.Command, args []string, newgopath string, newtarget stri
 	listArgs = append(listArgs, "./...")
 	pkgs := cover.ListPackages(target, listArgs, newgopath)
 
-	//
-	//
 	var seen = make(map[string]*cover.PackageCover)
 	var seenCache = make(map[string]*cover.PackageCover)
 	for _, pkg := range pkgs {
-		//
 		if pkg.Name == "main" {
 			log.Printf("handle package: %v", pkg.ImportPath)
 			// inject the main package
diff --git a/cmd/profile.go b/cmd/profile.go
new file mode 100644
index 0000000..6486be5
--- /dev/null
+++ b/cmd/profile.go
@@ -0,0 +1,61 @@
+/*
+ Copyright 2020 Qiniu Cloud (七牛云)
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+package cmd
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"log"
+	"os"
+
+	"github.com/qiniu/goc/pkg/cover"
+	"github.com/spf13/cobra"
+)
+
+var profileCmd = &cobra.Command{
+	Use:   "profile",
+	Short: "Get coverage profile from service registry center",
+	Run: func(cmd *cobra.Command, args []string) {
+		res, err := cover.NewWorker().Profile(center)
+		if err != nil {
+			log.Fatalf("call host %v failed, err: %v, response: %v", center, err, string(res))
+		}
+
+		if output == "" {
+			fmt.Fprint(os.Stdout, string(res))
+		} else {
+			f, err := os.Create(output)
+			if err != nil {
+				log.Fatalf("failed to create file %s, err:%v", output, err)
+			}
+			defer f.Close()
+			_, err = io.Copy(f, bytes.NewReader(res))
+			if err != nil {
+				log.Fatalf("failed to write file: %v, err: %v", output, err)
+			}
+		}
+	},
+}
+
+var output string
+
+func init() {
+	profileCmd.Flags().StringVarP(&output, "output", "o", "", "download cover profile")
+	profileCmd.Flags().StringVarP(&center, "center", "", "http://127.0.0.1:7777", "cover profile host center")
+	rootCmd.AddCommand(profileCmd)
+}
diff --git a/cmd/server.go b/cmd/server.go
index 29e9d15..cd0b719 100644
--- a/cmd/server.go
+++ b/cmd/server.go
@@ -23,7 +23,7 @@ import (
 
 var serverCmd = &cobra.Command{
 	Use:   "server",
-	Short: "Start a server to host all services",
+	Short: "Start a service registry center",
 	Run: func(cmd *cobra.Command, args []string) {
 		cover.StartServer(port)
 	},
diff --git a/pkg/cover/worker.go b/pkg/cover/client.go
similarity index 100%
rename from pkg/cover/worker.go
rename to pkg/cover/client.go