diff --git a/paddlehub/common/utils.py b/paddlehub/common/utils.py
index 2ac04673151c876cee0982caac2da34b6a494977..5aa4f7a3f71d338ad679652e0e2175bed219c276 100644
--- a/paddlehub/common/utils.py
+++ b/paddlehub/common/utils.py
@@ -65,10 +65,14 @@ def base64s_to_cvmats(base64s):
     return base64s
 
 
-def handle_mask_results(results):
+def handle_mask_results(results, data_len):
     result = []
-    if len(results) <= 0:
-        return results
+    if len(results) <= 0 and data_len != 0:
+        return [{
+            "data": "No face.",
+            "id": i,
+            "path": ""
+        } for i in range(1, data_len + 1)]
     _id = results[0]["id"]
     _item = {
         "data": [],
@@ -87,6 +91,15 @@ def handle_mask_results(results):
                 "id": item.get("id", _id)
             }
     result.append(_item)
+    for index in range(1, data_len + 1):
+        if index > len(result):
+            result.append({"data": "No face.", "id": index, "path": ""})
+        elif result[index - 1]["id"] != index:
+            result.insert(index - 1, {
+                "data": "No face.",
+                "id": index,
+                "path": ""
+            })
     return result
 
 
diff --git a/paddlehub/serving/app_single.py b/paddlehub/serving/app_single.py
index 1cfeb94f83b148209a58c5b0020d0bab38eb4aff..f73c1814f6fca14cb415b1aa60b750ea1b8e0ad4 100644
--- a/paddlehub/serving/app_single.py
+++ b/paddlehub/serving/app_single.py
@@ -140,6 +140,8 @@ def predict_mask(module, input_img, id, batch_size, extra=None, r_img=True):
     global use_gpu
     method_name = module.desc.attr.map.data['default_signature'].s
     predict_method = getattr(module, method_name)
+    data_len = len(input_img)
+    results = []
     try:
         data = {}
         if input_img is not None:
@@ -153,7 +155,7 @@ def predict_mask(module, input_img, id, batch_size, extra=None, r_img=True):
             visualization=r_img,
             use_gpu=use_gpu,
             batch_size=batch_size)
-        results = utils.handle_mask_results(results)
+        results = utils.handle_mask_results(results, data_len)
     except Exception as err:
         curr = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(time.time()))
         print(curr, " - ", err)
@@ -170,20 +172,27 @@ def predict_mask(module, input_img, id, batch_size, extra=None, r_img=True):
                 input_img = input_img.get("image", [])
                 for index in range(len(input_img)):
                     item = input_img[index]
-                    with open(os.path.join(output_folder, item), "rb") as fp:
-                        b_head = "data:image/" + item.split(".")[-1] + ";base64"
-                        b_body = base64.b64encode(fp.read())
-                        b_body = str(b_body).replace("b'", "").replace("'", "")
-                        b_img = b_head + "," + b_body
-                        base64_list.append(b_img)
-                        results[index]["path"] = results[index]["path"].replace(
-                            id + "_", "") if results[index]["path"] != "" \
-                            else ""
-
-                        results[index].update({"base64": b_img})
+                    file_path = os.path.join(output_folder, item)
+                    if not os.path.exists(file_path):
                         results_pack.append(results[index])
-                    os.remove(item)
-                    os.remove(os.path.join(output_folder, item))
+                        os.remove(item)
+                    else:
+                        with open(file_path, "rb") as fp:
+                            b_head = "data:image/" + item.split(
+                                ".")[-1] + ";base64"
+                            b_body = base64.b64encode(fp.read())
+                            b_body = str(b_body).replace("b'", "").replace(
+                                "'", "")
+                            b_img = b_head + "," + b_body
+                            base64_list.append(b_img)
+                            results[index]["path"] = results[index]["path"].replace(
+                                id + "_", "") if results[index]["path"] != "" \
+                                else ""
+
+                            results[index].update({"base64": b_img})
+                            results_pack.append(results[index])
+                        os.remove(item)
+                        os.remove(os.path.join(output_folder, item))
         else:
             results_pack = results