diff --git a/modelscope/models/multi_modal/ofa_for_all_tasks.py b/modelscope/models/multi_modal/ofa_for_all_tasks.py
index 05950378..45bafde9 100644
--- a/modelscope/models/multi_modal/ofa_for_all_tasks.py
+++ b/modelscope/models/multi_modal/ofa_for_all_tasks.py
@@ -112,8 +112,6 @@ class OfaForAllTasks(TorchModel):
                 OutputKeys.CAPTION, OutputKeys.TEXT, OutputKeys.BOXES,
                 OutputKeys.LABELS, OutputKeys.SCORES
         ]:
-            if key in ret and len(ret[key]) == 1:
-                ret[key] = ret[key][0]
             if key not in ret:
                 ret[key] = None
         return ret
@@ -121,8 +119,10 @@ class OfaForAllTasks(TorchModel):
     def postprocess(self, input: Dict[str, Tensor],
                     **kwargs) -> Dict[str, Tensor]:
         if self.cfg.task == Tasks.image_captioning:
-            caption = input[OutputKeys.CAPTION]
-            caption = caption.translate(self.transtab).strip()
+            caption = [
+                cap.translate(self.transtab).strip()
+                for cap in input[OutputKeys.CAPTION]
+            ]
             input[OutputKeys.CAPTION] = caption
         return input
 
diff --git a/tests/pipelines/test_ofa_tasks.py b/tests/pipelines/test_ofa_tasks.py
index 9a72d1ff..e6638dfa 100644
--- a/tests/pipelines/test_ofa_tasks.py
+++ b/tests/pipelines/test_ofa_tasks.py
@@ -147,8 +147,10 @@ class OfaTasksTest(unittest.TestCase, DemoCompatibilityCheck):
         result = ofa_pipe(input)
         print(result)
         image_name = image.split('/')[-2]
-        self.save_img(image, result[OutputKeys.BOXES],
-                      osp.join('large_en_model_' + image_name + '.png'))
+        self.save_img(
+            image,
+            result[OutputKeys.BOXES][0],  # just one box
+            osp.join('large_en_model_' + image_name + '.png'))
 
     @unittest.skipUnless(test_level() >= 1, 'skip test in current test level')
     def test_run_with_visual_grounding_with_name(self):
@@ -161,7 +163,7 @@ class OfaTasksTest(unittest.TestCase, DemoCompatibilityCheck):
         result = ofa_pipe(input)
         print(result)
         image_name = image.split('/')[-2]
-        self.save_img(image, result[OutputKeys.BOXES],
+        self.save_img(image, result[OutputKeys.BOXES][0],
                       osp.join('large_en_name_' + image_name + '.png'))
 
     @unittest.skipUnless(test_level() >= 0, 'skip test in current test level')
@@ -174,7 +176,7 @@ class OfaTasksTest(unittest.TestCase, DemoCompatibilityCheck):
         result = ofa_pipe(input)
         print(result)
         image_name = image.split('/')[-1]
-        self.save_img(image, result[OutputKeys.BOXES],
+        self.save_img(image, result[OutputKeys.BOXES][0],
                       osp.join('large_zh_name_' + image_name))
 
     @unittest.skipUnless(test_level() >= 1, 'skip test in current test level')