diff --git a/demo/object_detection/predict_faster_rcnn.py b/demo/object_detection/predict_faster_rcnn.py
index 0758f0caa1b5632ab2510d8cea0b9ff1a6173fd6..60e6bffdf9b8b3d8edaedbeb70e7982e1d2a8f41 100644
--- a/demo/object_detection/predict_faster_rcnn.py
+++ b/demo/object_detection/predict_faster_rcnn.py
@@ -27,27 +27,14 @@ def predict(args):
 
     # define batch reader
     data_reader = ObjectDetectionReader(dataset=dataset, model_type='rcnn')
-
-    input_dict, output_dict, program = module.context(trainable=True)
     pred_input_dict, pred_output_dict, pred_program = module.context(
         trainable=False, phase='predict')
 
-    feed_list = [
-        input_dict["image"].name, input_dict["im_info"].name,
-        input_dict['gt_bbox'].name, input_dict['gt_class'].name,
-        input_dict['is_crowd'].name
-    ]
-
     pred_feed_list = [
         pred_input_dict['image'].name, pred_input_dict['im_info'].name,
         pred_input_dict['im_shape'].name
     ]
 
-    feature = [
-        output_dict['head_feat'], output_dict['rpn_cls_loss'],
-        output_dict['rpn_reg_loss'], output_dict['generate_proposal_labels']
-    ]
-
     pred_feature = [pred_output_dict['head_feat'], pred_output_dict['rois']]
 
     config = hub.RunConfig(
@@ -62,8 +49,6 @@ def predict(args):
     task = hub.FasterRCNNTask(
         data_reader=data_reader,
         num_classes=dataset.num_labels,
-        feed_list=feed_list,
-        feature=feature,
         predict_feed_list=pred_feed_list,
         predict_feature=pred_feature,
         config=config)
diff --git a/paddlehub/finetune/task/detection_task.py b/paddlehub/finetune/task/detection_task.py
index 11c2afe81ef4a2eedadd2c7abca36aa4680d2a91..82f368c903a0d4ea9cba5e1ff3ebd553daca1e8e 100644
--- a/paddlehub/finetune/task/detection_task.py
+++ b/paddlehub/finetune/task/detection_task.py
@@ -116,7 +116,7 @@ class DetectionTask(BaseTask):
         if metrics_choices == "default":
             metrics_choices = ["ap"]
 
-        main_program = feature[0].block.program
+        main_program = feature[0].block.program if feature else None
         super(DetectionTask, self).__init__(
             data_reader=data_reader,
             main_program=main_program,
diff --git a/paddlehub/finetune/task/faster_rcnn_task.py b/paddlehub/finetune/task/faster_rcnn_task.py
index 2d4916cfcadab127c3d980a690d9cdb9968a13ea..4cd079df72b9a0904c016b89c420a42c81d6525a 100644
--- a/paddlehub/finetune/task/faster_rcnn_task.py
+++ b/paddlehub/finetune/task/faster_rcnn_task.py
@@ -28,12 +28,12 @@ from paddlehub.finetune.task.detection_task import DetectionTask
 
 class FasterRCNNTask(DetectionTask):
     def __init__(self,
-                 data_reader,
                  num_classes,
-                 feed_list,
-                 feature,
-                 predict_feed_list=None,
+                 data_reader,
+                 feature=None,
+                 feed_list=None,
                  predict_feature=None,
+                 predict_feed_list=None,
                  startup_program=None,
                  config=None,
                  metrics_choices="default"):
diff --git a/paddlehub/finetune/task/ssd_task.py b/paddlehub/finetune/task/ssd_task.py
index 4b99e7c14a590321e1fccc4c4a2531a298605f81..c571f34551b306569a52197c58b8be73e8b57ba8 100644
--- a/paddlehub/finetune/task/ssd_task.py
+++ b/paddlehub/finetune/task/ssd_task.py
@@ -24,10 +24,10 @@ from paddlehub.finetune.task.detection_task import DetectionTask
 
 class SSDTask(DetectionTask):
     def __init__(self,
-                 data_reader,
+                 feature,
                  num_classes,
                  feed_list,
-                 feature,
+                 data_reader,
                  multi_box_head_config,
                  startup_program=None,
                  config=None,
diff --git a/paddlehub/finetune/task/yolo_task.py b/paddlehub/finetune/task/yolo_task.py
index 07b499ba8b67d84f3b13e2f857b755cffeeb163d..a13ba3e1e99e28d9c804a67827e2c32ef09a7f26 100644
--- a/paddlehub/finetune/task/yolo_task.py
+++ b/paddlehub/finetune/task/yolo_task.py
@@ -26,10 +26,10 @@ from paddlehub.finetune.task.detection_task import DetectionTask
 
 class YOLOTask(DetectionTask):
     def __init__(self,
-                 data_reader,
+                 feature,
                  num_classes,
                  feed_list,
-                 feature,
+                 data_reader,
                  startup_program=None,
                  config=None,
                  metrics_choices="default"):