diff --git a/clang-format.ps1 b/clang-format.ps1
new file mode 100644
index 000000000..ddbe3f8e9
--- /dev/null
+++ b/clang-format.ps1
@@ -0,0 +1,42 @@
+param (
+    [switch]$n,
+    [switch]$i
+)
+
+$WEASEL_SOURCE_PATH = @("RimeWithWeasel", "WeaselDeployer", "WeaselIME", `
+  "WeaselIPC", "WeaselIPCServer", "WeaselServer", "WeaselSetup", `
+  "WeaselTSF", "WeaselUI", "include", "test")
+$excludePatterns = Get-Content .exclude_pattern.txt
+
+function ShouldExclude($filePath) {
+  foreach ($pattern in $excludePatterns) {
+    if ($filePath -like "*$pattern*") {
+      return $true
+    }
+  }
+  return $false
+}
+
+$filesToProcess = @()
+
+$WEASEL_SOURCE_PATH | ForEach-Object {
+  $filesToProcess += Get-ChildItem -Path $_ -Recurse -Include *.cpp, *.h | `
+  Where-Object { $_.FullName -notmatch "include\\wtl\\" -and -not (ShouldExclude $_.FullName) } | `
+  ForEach-Object { $_.FullName }
+}
+
+if ($filesToProcess.Count -gt 0) {
+  if ($n) {
+    clang-format --verbose -i $filesToProcess
+    Write-Host "Formatting done!"
+  } elseif ($i) {
+    clang-format --verbose -Werror --dry-run $filesToProcess
+    if ($LASTEXITCODE -ne 0) {
+      Write-Host "Please lint your code by './clang-format.ps1 -n'."
+      exit 1
+    }
+    Write-Host "Format checking pass!"
+  }
+} else {
+  Write-Host "No files to process."
+}