diff --git a/ppcls/data/postprocess/topk.py b/ppcls/data/postprocess/topk.py
index df02719471300ea8e2b7c1db286d104adabe116f..76772f568eef157c4bb5e3485ea9ec5bc41f9d20 100644
--- a/ppcls/data/postprocess/topk.py
+++ b/ppcls/data/postprocess/topk.py
@@ -21,9 +21,9 @@ import paddle.nn.functional as F
 class Topk(object):
     def __init__(self, topk=1, class_id_map_file=None, delimiter=None):
         assert isinstance(topk, (int, ))
-        self.class_id_map = self.parse_class_id_map(class_id_map_file)
         self.topk = topk
         self.delimiter = delimiter if delimiter is not None else " "
+        self.class_id_map = self.parse_class_id_map(class_id_map_file)
 
     def parse_class_id_map(self, class_id_map_file):
         if class_id_map_file is None:
diff --git a/ppcls/engine/engine.py b/ppcls/engine/engine.py
index 3e39daef8e442aeb8c6ea1a6d3c8d96fb140547d..34cb4c4da7f05a2594e2ee7a923abd4137a92f03 100644
--- a/ppcls/engine/engine.py
+++ b/ppcls/engine/engine.py
@@ -177,7 +177,7 @@ class Engine(object):
                     self.eval_metric_func = None
             elif self.eval_mode == "retrieval":
                 if "Metric" in self.config and "Eval" in self.config["Metric"]:
-                    metric_config = metric_config["Metric"]["Eval"]
+                    metric_config = self.config["Metric"]["Eval"]
                 else:
                     metric_config = [{"name": "Recallk", "topk": (1, 5)}]
                 self.eval_metric_func = build_metrics(metric_config)