diff --git a/paddlehub/serving/http_server.py b/paddlehub/serving/http_server.py
index bdb731b0c53fa2373d0340d2021eaeafaa8196f0..5338d9b6f1203a08b811d22144383a102270f2b7 100644
--- a/paddlehub/serving/http_server.py
+++ b/paddlehub/serving/http_server.py
@@ -143,12 +143,12 @@ def create_app(client_port: int = 5559, modules_name: list = []):
 
         if module_name not in modules_name:
             msg = "Module {} is not available.".format(module_name)
-            return package_result("111", "", msg)
+            return package_result("111", msg, "")
         inputs = request.json
         if inputs is None:
-            results = "This usage is out of date, please use 'application/json' as content-type to post to /predict/%s. See 'https://github.com/PaddlePaddle/PaddleHub/blob/release/v1.6/docs/tutorial/serving.md' for more details." % (
+            msg = "This usage is out of date, please use 'application/json' as content-type to post to /predict/%s. See 'https://github.com/PaddlePaddle/PaddleHub/blob/release/v1.6/docs/tutorial/serving.md' for more details." % (
                 module_name)
-            return package_result("112", results, "")
+            return package_result("112", msg, "")
         inputs = {'module_name': module_name, 'inputs': inputs}
         port_str = 'tcp://localhost:%s' % client_port
 
@@ -156,7 +156,7 @@ def create_app(client_port: int = 5559, modules_name: list = []):
 
         results = client.send_req(inputs)
 
-        return package_result("000", results, "")
+        return package_result("000", "", results)
 
     return app_instance