diff --git a/tools/deploy_test.py b/tools/deploy_test.py
index fedd645..eca5430 100644
--- a/tools/deploy_test.py
+++ b/tools/deploy_test.py
@@ -324,3 +324,15 @@ def main():
 
 if __name__ == '__main__':
     main()
+
+    # Following strings of text style are from colorama package
+    bright_style, reset_style = '\x1b[1m', '\x1b[0m'
+    red_text, blue_text = '\x1b[31m', '\x1b[34m'
+    white_background = '\x1b[107m'
+
+    msg = white_background + bright_style + red_text
+    msg += 'DeprecationWarning: This tool will be deprecated in future. '
+    msg += blue_text + 'Welcome to use the unified model deployment toolbox '
+    msg += 'MMDeploy: https://github.com/open-mmlab/mmdeploy'
+    msg += reset_style
+    warnings.warn(msg)
diff --git a/tools/onnx2tensorrt.py b/tools/onnx2tensorrt.py
index f8a258f..0f60dce 100644
--- a/tools/onnx2tensorrt.py
+++ b/tools/onnx2tensorrt.py
@@ -2,6 +2,7 @@
 import argparse
 import os
 import os.path as osp
+import warnings
 from typing import Iterable, Optional, Union
 
 import matplotlib.pyplot as plt
@@ -274,3 +275,15 @@ if __name__ == '__main__':
         dataset=args.dataset,
         workspace_size=args.workspace_size,
         verbose=args.verbose)
+
+    # Following strings of text style are from colorama package
+    bright_style, reset_style = '\x1b[1m', '\x1b[0m'
+    red_text, blue_text = '\x1b[31m', '\x1b[34m'
+    white_background = '\x1b[107m'
+
+    msg = white_background + bright_style + red_text
+    msg += 'DeprecationWarning: This tool will be deprecated in future. '
+    msg += blue_text + 'Welcome to use the unified model deployment toolbox '
+    msg += 'MMDeploy: https://github.com/open-mmlab/mmdeploy'
+    msg += reset_style
+    warnings.warn(msg)
diff --git a/tools/pytorch2onnx.py b/tools/pytorch2onnx.py
index 9de3404..060d187 100644
--- a/tools/pytorch2onnx.py
+++ b/tools/pytorch2onnx.py
@@ -1,5 +1,6 @@
 # Copyright (c) OpenMMLab. All rights reserved.
 import argparse
+import warnings
 from functools import partial
 
 import mmcv
@@ -390,3 +391,15 @@ if __name__ == '__main__':
         output_file=args.output_file,
         verify=args.verify,
         dynamic_export=args.dynamic_export)
+
+    # Following strings of text style are from colorama package
+    bright_style, reset_style = '\x1b[1m', '\x1b[0m'
+    red_text, blue_text = '\x1b[31m', '\x1b[34m'
+    white_background = '\x1b[107m'
+
+    msg = white_background + bright_style + red_text
+    msg += 'DeprecationWarning: This tool will be deprecated in future. '
+    msg += blue_text + 'Welcome to use the unified model deployment toolbox '
+    msg += 'MMDeploy: https://github.com/open-mmlab/mmdeploy'
+    msg += reset_style
+    warnings.warn(msg)