diff --git a/sysservice/httpserverervice.go b/sysservice/httpserverervice.go
index 7e8d6e3..838b4e0 100644
--- a/sysservice/httpserverervice.go
+++ b/sysservice/httpserverervice.go
@@ -148,7 +148,7 @@ func (slf *HttpServerService) SetHttps(certfile string, keyfile string) bool {
 //序列化后写入Respone
 func (slf *HttpRespone) WriteRespne(v interface{}) error {
 	StrRet, retErr := json.Marshal(v)
-	if retErr == nil {
+	if retErr != nil {
 		slf.Respone = []byte(`{"Code": 2,"Message":"service error"}`)
 		common.LogPrintf(sysmodule.LEVER_ERROR, "Json Marshal Error")
 	} else {