diff --git a/fluid/PaddleCV/rcnn/eval_coco_map.py b/fluid/PaddleCV/rcnn/eval_coco_map.py
index 06ae3589065d849fda461bc41fa0abf4abd94515..6b01da55ade6e9b5dabf370c30208c465028df9f 100644
--- a/fluid/PaddleCV/rcnn/eval_coco_map.py
+++ b/fluid/PaddleCV/rcnn/eval_coco_map.py
@@ -111,8 +111,10 @@ def eval():
     assert len(dts_res) > 0, "The number of valid bbox detected is zero.\n \
         Please use reasonable model and check input data."
 
-    assert len(segms_res) > 0, "The number of valid mask detected is zero.\n \
-        Please use reasonable model and check input data.."
+    if cfg.MASK_ON:
+        assert len(
+            segms_res) > 0, "The number of valid mask detected is zero.\n \
+            Please use reasonable model and check input data.."
 
     with open("detection_bbox_result.json", 'w') as outfile:
         json.dump(dts_res, outfile)