diff --git a/python/examples/imagenet/resnet50_rpc_client.py b/python/examples/imagenet/resnet50_rpc_client.py
index 7888ab6302b483672ec1d7270f7db0c551f1778d..b23f99175b97a011c3b1c72d3b7358b646c54e68 100644
--- a/python/examples/imagenet/resnet50_rpc_client.py
+++ b/python/examples/imagenet/resnet50_rpc_client.py
@@ -38,7 +38,8 @@ start = time.time()
 image_file = "https://paddle-serving.bj.bcebos.com/imagenet-example/daisy.jpg"
 for i in range(10):
     img = seq(image_file)
-    fetch_map = client.predict(feed={"image": img}, fetch=["score"])
+    fetch_map = client.predict(
+        feed={"image": img}, fetch=["score"], batch=False)
     prob = max(fetch_map["score"][0])
     label = label_dict[fetch_map["score"][0].tolist().index(prob)].strip(
     ).replace(",", "")
diff --git a/python/examples/imagenet/resnet50_web_service.py b/python/examples/imagenet/resnet50_web_service.py
index 4c9822757ce233498ef9ec2baf5f3fcac7bc1ccb..7033103717621807ecd74093bf5eba8d31a9b877 100644
--- a/python/examples/imagenet/resnet50_web_service.py
+++ b/python/examples/imagenet/resnet50_web_service.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 import sys
 from paddle_serving_client import Client
-
+import numpy as np
 from paddle_serving_app.reader import Sequential, URL2Image, Resize, CenterCrop, RGB2BGR, Transpose, Div, Normalize, Base64ToImage
 
 if len(sys.argv) != 4:
@@ -44,12 +44,13 @@ class ImageService(WebService):
 
     def preprocess(self, feed=[], fetch=[]):
         feed_batch = []
+        is_batch = True
         for ins in feed:
             if "image" not in ins:
                 raise ("feed data error!")
             img = self.seq(ins["image"])
             feed_batch.append({"image": img[np.newaxis, :]})
-        return feed_batch, fetch
+        return feed_batch, fetch, is_batch
 
     def postprocess(self, feed=[], fetch=[], fetch_map={}):
         score_list = fetch_map["score"]