diff --git a/python/paddle_serving_server/web_service.py b/python/paddle_serving_server/web_service.py
index adf0d68c08c040140f4e4e5bb1b4f6b7743599a7..a03649725b1c41ca94b8ef495a2fc80e8293aba0 100755
--- a/python/paddle_serving_server/web_service.py
+++ b/python/paddle_serving_server/web_service.py
@@ -67,10 +67,10 @@ class WebService(object):
                 break
 
     def _launch_web_service(self):
-        self.client_service = Client()
-        self.client_service.load_client_config(
-            "{}/serving_server_conf.prototxt".format(self.model_config))
-        self.client_service.connect(["0.0.0.0:{}".format(self.port_list[0])])
+        self.client = Client()
+        self.client.load_client_config("{}/serving_server_conf.prototxt".format(
+            self.model_config))
+        self.client.connect(["0.0.0.0:{}".format(self.port_list[0])])
 
     def get_prediction(self, request):
         if not request.json:
@@ -79,22 +79,14 @@ class WebService(object):
             abort(400)
         try:
             feed, fetch = self.preprocess(request.json, request.json["fetch"])
-            if isinstance(feed, list):
-                fetch_map_batch = self.client_service.predict(
-                    feed_batch=feed, fetch=fetch)
-                fetch_map_batch = self.postprocess(
-                    feed=request.json, fetch=fetch, fetch_map=fetch_map_batch)
-                for key in fetch_map_batch:
-                    fetch_map_batch[key] = fetch_map_batch[key].tolist()
-                result = {"result": fetch_map_batch}
-            elif isinstance(feed, dict):
-                if "fetch" in feed:
-                    del feed["fetch"]
-                fetch_map = self.client_service.predict(feed=feed, fetch=fetch)
-                for key in fetch_map:
-                    fetch_map[key] = fetch_map[key][0].tolist()
-                result = self.postprocess(
-                    feed=request.json, fetch=fetch, fetch_map=fetch_map)
+            if isinstance(feed, dict) and "fetch" in feed:
+                del feed["fetch"]
+            fetch_map = self.client.predict(feed=feed, fetch=fetch)
+            fetch_map = self.postprocess(
+                feed=request.json, fetch=fetch, fetch_map=fetch_map)
+            for key in fetch_map:
+                fetch_map[key] = fetch_map[key].tolist()
+            result = {"result": fetch_map}
         except ValueError:
             result = {"result": "Request Value Error"}
         return result
diff --git a/python/paddle_serving_server_gpu/web_service.py b/python/paddle_serving_server_gpu/web_service.py
index ed7f16c5b822335d83937f013f44d90b01c0a19a..6841220f9f4e52a23bc7b0a0176c58672fc4b675 100644
--- a/python/paddle_serving_server_gpu/web_service.py
+++ b/python/paddle_serving_server_gpu/web_service.py
@@ -121,13 +121,18 @@ class WebService(object):
             abort(400)
         if "fetch" not in request.json:
             abort(400)
-        feed, fetch = self.preprocess(request.json, request.json["fetch"])
-        fetch_map_batch = self.client.predict(feed=feed, fetch=fetch)
-        fetch_map_batch = self.postprocess(
-            feed=request.json, fetch=fetch, fetch_map=fetch_map_batch)
-        for key in fetch_map_batch:
-            fetch_map_batch[key] = fetch_map_batch[key].tolist()
-        result = {"result": fetch_map_batch}
+        try:
+            feed, fetch = self.preprocess(request.json, request.json["fetch"])
+            if isinstance(feed, dict) and "fetch" in feed:
+                del feed["fetch"]
+            fetch_map = self.client.predict(feed=feed, fetch=fetch)
+            fetch_map = self.postprocess(
+                feed=request.json, fetch=fetch, fetch_map=fetch_map)
+            for key in fetch_map:
+                fetch_map[key] = fetch_map[key].tolist()
+            result = {"result": fetch_map}
+        except ValueError:
+            result = {"result": "Request Value Error"}
         return result
 
     def run_server(self):