diff --git a/csst_dfs_client/common/utils.py b/csst_dfs_client/common/utils.py
new file mode 100644
index 0000000000000000000000000000000000000000..b30a8bca6a1a51275997ad21cc1946ba328b6f25
--- /dev/null
+++ b/csst_dfs_client/common/utils.py
@@ -0,0 +1,16 @@
+from datetime import datetime
+import re
+
+def is_valid_filename(file_name: str) -> bool:
+    pattern = r'^.*\..*$'
+    if re.match(pattern, file_name):
+        return True
+    else:
+        raise False
+    
+def is_valid_datetime_format(date_str: str, format='%Y-%m-%d %H:%M:%S') -> bool:
+    try:
+        datetime.strptime(date_str, format)
+        return True
+    except ValueError:
+        raise ValueError(f"Incorrect data format, should be {format}")
\ No newline at end of file