diff --git a/Documentation/applications/system/gcov/index.rst b/Documentation/applications/system/gcov/index.rst
index 6d35f89097bbb..62ab2eb23b80f 100644
--- a/Documentation/applications/system/gcov/index.rst
+++ b/Documentation/applications/system/gcov/index.rst
@@ -86,6 +86,16 @@ Examples of applicable platforms
      find ./ -name "*.gcda"
      ```
 
+  5. Examples:
+     ```
+     $ ./tools/configure.sh sim:nsh
+     nsh: poweroff
+     $ ./nuttx/tools/gcov.py -t gcov
+     Then open ./gcov/result/index.html with your browser
+     ```
+
+2. Applicable to device
+
 2. Applicable to device
 
   Due to differences in implementation methods, the device side is divided into GCC and CLANG
@@ -129,10 +139,10 @@ Examples of applicable platforms
         # The -t parameter specifies the gcov version, which needs to match the gcc version
 
         # sim
-        ./tools/gcov.sh -t gcov-13
+        ./tools/gcov.py -t gcov
 
         # arm platform
-        ./tools/gcov.sh -t arm-none-eabi-gcov
+        ./tools/gcov.py -t arm-none-eabi-gcov
 
     5. Impact and precautions
        ```
diff --git a/tools/gcov.py b/tools/gcov.py
index 311df031f14e2..946b73d6b0618 100755
--- a/tools/gcov.py
+++ b/tools/gcov.py
@@ -110,19 +110,17 @@ def arg_parser():
     )
     parser.add_argument("-i", "--input", help="Input dump data")
     parser.add_argument("-t", dest="gcov_tool", help="Path to gcov tool")
-    parser.add_argument(
-        "-b", dest="base_dir", default=os.getcwd(), help="Compile base directory"
-    )
+    parser.add_argument("-b", dest="base_dir", help="Compile base directory")
     parser.add_argument(
         "-s",
         dest="gcno_dir",
-        default=os.getcwd(),
+        default=".",
         help="Directory containing gcno files",
     )
     parser.add_argument(
         "-a",
         dest="gcda_dir",
-        default=os.getcwd(),
+        default=".",
         nargs="+",
         help="Directory containing gcda files",
     )
@@ -136,8 +134,7 @@ def arg_parser():
     parser.add_argument(
         "-o",
         dest="gcov_dir",
-        nargs="?",
-        default=os.getcwd(),
+        default="gcov",
         help="Directory to store gcov data and report",
     )
 
@@ -151,10 +148,7 @@ def main():
     gcov_dir = os.path.abspath(args.gcov_dir)
     gcno_dir = os.path.abspath(args.gcno_dir)
 
-    if os.path.exists(gcov_dir):
-        shutil.rmtree(gcov_dir)
-
-    os.makedirs(gcov_dir)
+    os.makedirs(gcov_dir, exist_ok=True)
 
     gcda_dir = []
     for i in args.gcda_dir:
@@ -249,11 +243,6 @@ def main():
         print("Failed to generate coverage file.")
         sys.exit(1)
 
-    for i in gcov_data_dir:
-        shutil.rmtree(i)
-
-    os.remove(coverage_file)
-
 
 if __name__ == "__main__":
     main()