diff --git a/csst_dfs_client/catalog.py b/csst_dfs_client/catalog.py
index a376a9484061d4d081185ac8adc0cfeeaffe0b99..f7af73742da949511d078bf8cc8a637a52518505 100644
--- a/csst_dfs_client/catalog.py
+++ b/csst_dfs_client/catalog.py
@@ -47,7 +47,9 @@ def search(ra: float,
                 'max_mag': max_mag,
                 'obstime': obstime,
                 'limit': limit
-            })        
+            })
+        if datas and isinstance(datas, Result):
+            return datas
         records = pickle.loads(datas._content)
         df, total_count = records['records'], records['totalCount']
         return Result.ok_data(data = df).append("totalCount", total_count)