diff --git a/localization/autoware_localization_evaluation_scripts/README.md b/localization/autoware_localization_evaluation_scripts/README.md
index 0a8e451c..035c892a 100644
--- a/localization/autoware_localization_evaluation_scripts/README.md
+++ b/localization/autoware_localization_evaluation_scripts/README.md
@@ -22,7 +22,10 @@ $HOME/driving_log_replayer_v2/out/latest/result_bag
 ## plot_diagnostics.py
 
 ```bash
-ros2 run autoware_localization_evaluation_scripts plot_diagnostics.py <rosbag_path>
+ros2 run autoware_localization_evaluation_scripts plot_diagnostics.py \
+   <rosbag_path> \
+   --save_dir=/your/path (default:rosbag_path/../) \
+   --storage=mcap (default:sqlite3)
 ```
 
 [Example]