diff --git a/client.go b/client.go
index 79dbd3f..ded483c 100644
--- a/client.go
+++ b/client.go
@@ -23,6 +23,7 @@ type SiteConfigItemReqArg struct {
 type SiteConfigItemRes struct {
 	Type  string
 	Value string
+	Exist bool
 }
 
 /**
@@ -32,6 +33,20 @@ type SiteConfigItemRes struct {
  * GZ
  */
 func GetConfigItem(site_id, dbname, key string, url ...string) (*SiteConfigItemRes, error) {
+	ret, err := getconfig(site_id, dbname, key, url...)
+	if err != nil {
+		return ret, err
+	}
+	if ret.Exist == false {
+		return ret, errors.New("no data")
+	}
+	return ret, err
+}
+func GetConfig(site_id, dbname, key string, url ...string) (*SiteConfigItemRes, error) {
+	return getconfig(site_id, dbname, key, url...)
+}
+
+func getconfig(site_id, dbname, key string, url ...string) (*SiteConfigItemRes, error) {
 
 	var site_rpc_url string = "127.0.0.1:7971"
 	if len(url) > 0 && url[0] != "" {