diff --git a/.gitignore b/.gitignore
index b48afc8b3d7a49fb2a8acc17d6499d5c5540321f..e90d51dfaf2903314e346abc5e074e2b9f6b889b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -56,4 +56,6 @@ web/
 bs.json
 nodeInfos.json
 apis.json
-output.dot
\ No newline at end of file
+output.dot
+call.dot
+call.svg
\ No newline at end of file
diff --git a/cmd/call_graph.go b/cmd/call_graph.go
index d0c7743a1e1329c1dd9991ac461c8292db88cab7..8a3c559aae099c748446a4644223fcdcb79e3558 100644
--- a/cmd/call_graph.go
+++ b/cmd/call_graph.go
@@ -7,6 +7,7 @@ import (
 	"encoding/json"
 	"github.com/spf13/cobra"
 	"log"
+	"os/exec"
 )
 
 
@@ -28,7 +29,14 @@ var callGraphCmd *cobra.Command = &cobra.Command{
 
  			_ = json.Unmarshal(file, &parsedDeps)
 
-			analyser.Analysis(className, *&parsedDeps)
+			content := analyser.Analysis(className, *&parsedDeps)
+			WriteToFile("call.dot", content)
+
+			cmd := exec.Command("dot", []string{"-Tsvg", "call.dot", "-o", "call.svg"}...)
+			_, err := cmd.CombinedOutput()
+			if err != nil {
+				log.Fatalf("cmd.Run() failed with %s\n", err)
+			}
 		}
 	},
 }
diff --git a/src/domain/call_graph.go b/src/domain/call_graph.go
index edd40a6996b2a03be9636940dc904f0159968f51..4a020df9815c3bc6edc7cfa5d00e1b70f9851253 100644
--- a/src/domain/call_graph.go
+++ b/src/domain/call_graph.go
@@ -2,7 +2,6 @@ package domain
 
 import (
 	"coca/src/adapter/models"
-	"fmt"
 )
 
 type CallGraph struct {
@@ -12,12 +11,20 @@ func NewCallGraph() CallGraph {
 	return *&CallGraph{}
 }
 
-func (c CallGraph) Analysis(funcName string, clzs []models.JClassNode) {
+func (c CallGraph) Analysis(funcName string, clzs []models.JClassNode) string {
 	methodMap := c.BuildMethodMap(clzs)
 
 	BuildCallChain(funcName, methodMap)
 	chain := BuildCallChain(funcName, methodMap)
-	fmt.Println(chain)
+	dotContent := toGraphviz(chain)
+	return dotContent
+}
+
+func toGraphviz(chain string) string {
+	var result = "digraph G { \n"
+	result = result + chain
+	result = result + "}\n"
+	return result
 }
 
 func BuildCallChain(funcName string, methodMap map[string][]string) string {