diff --git a/packages/adb/package.json b/packages/adb/package.json
index d35b1e2f..9cbadb6b 100644
--- a/packages/adb/package.json
+++ b/packages/adb/package.json
@@ -26,6 +26,7 @@
     "dependencies": {
         "@yume-chan/async-operation-manager": "^2.0.0",
         "@yume-chan/event": "^0.0.1",
+        "@yume-chan/struct": "^0.0.0",
         "tslib": "^2.0.1"
     }
 }
diff --git a/packages/adb/src/sync.ts b/packages/adb/src/sync.ts
index 7a4c3709..077ffe70 100644
--- a/packages/adb/src/sync.ts
+++ b/packages/adb/src/sync.ts
@@ -1,7 +1,8 @@
 import { AutoDisposable } from '@yume-chan/event';
+import { Struct, StructInitType, StructValueType } from '@yume-chan/struct';
 import { AdbBufferedStream } from './buffered-stream';
 import { AdbStream } from './stream';
-import { AutoResetEvent, Struct, StructInitType, StructValueType } from './utils';
+import { AutoResetEvent } from './utils';
 
 export enum AdbSyncRequestId {
     List = 'LIST',
diff --git a/packages/adb/src/utils/index.ts b/packages/adb/src/utils/index.ts
index 5d7d3c1f..dd33d06f 100644
--- a/packages/adb/src/utils/index.ts
+++ b/packages/adb/src/utils/index.ts
@@ -1,5 +1,3 @@
 export * from './auto-reset-event';
 export * from './base64';
 export * from './event-iterator';
-export * from './struct';
-export { default as Struct } from './struct';
diff --git a/packages/adb/tsconfig.json b/packages/adb/tsconfig.json
index fc6f450a..8617f539 100644
--- a/packages/adb/tsconfig.json
+++ b/packages/adb/tsconfig.json
@@ -7,6 +7,9 @@
     "references": [
         {
             "path": "../event/tsconfig.json"
+        },
+        {
+            "path": "../struct/tsconfig.json"
         }
     ]
 }
diff --git a/packages/struct/README.md b/packages/struct/README.md
new file mode 100644
index 00000000..bdf912f1
--- /dev/null
+++ b/packages/struct/README.md
@@ -0,0 +1,11 @@
+# `struct`
+
+> TODO: description
+
+## Usage
+
+```
+const struct = require('struct');
+
+// TODO: DEMONSTRATE API
+```
diff --git a/packages/struct/package-lock.json b/packages/struct/package-lock.json
new file mode 100644
index 00000000..afcdd55e
--- /dev/null
+++ b/packages/struct/package-lock.json
@@ -0,0 +1,19 @@
+{
+	"name": "@yume-chan/struct",
+	"version": "0.0.0",
+	"lockfileVersion": 1,
+	"requires": true,
+	"dependencies": {
+		"tslib": {
+			"version": "2.0.1",
+			"resolved": "https://registry.npmjs.org/tslib/-/tslib-2.0.1.tgz",
+			"integrity": "sha512-SgIkNheinmEBgx1IUNirK0TUD4X9yjjBRTqqjggWCU3pUEqIk3/Uwl3yRixYKT6WjQuGiwDv4NomL3wqRCj+CQ=="
+		},
+		"typescript": {
+			"version": "4.0.3",
+			"resolved": "https://registry.npmjs.org/typescript/-/typescript-4.0.3.tgz",
+			"integrity": "sha512-tEu6DGxGgRJPb/mVPIZ48e69xCn2yRmCgYmDugAVwmJ6o+0u1RI18eO7E7WBTLYLaEVVOhwQmcdhQHweux/WPg==",
+			"dev": true
+		}
+	}
+}
diff --git a/packages/struct/package.json b/packages/struct/package.json
new file mode 100644
index 00000000..77814939
--- /dev/null
+++ b/packages/struct/package.json
@@ -0,0 +1,30 @@
+{
+  "name": "@yume-chan/struct",
+  "version": "0.0.0",
+  "description": "Easy to use C structure serializer and deserializer",
+  "keywords": [
+    "structure",
+    "typescript"
+  ],
+  "author": "Simon Chan <cnsimonchan@live.com>",
+  "homepage": "https://github.com/yume-chan/ya-webadb#readme",
+  "license": "MIT",
+  "main": "lib/index.js",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/yume-chan/ya-webadb.git"
+  },
+  "scripts": {
+    "build": "tsc -b",
+    "build:watch": "tsc -b -w"
+  },
+  "bugs": {
+    "url": "https://github.com/yume-chan/ya-webadb/issues"
+  },
+  "devDependencies": {
+    "typescript": "4.0.3"
+  },
+  "dependencies": {
+    "tslib": "2.0.1"
+  }
+}
diff --git a/packages/struct/src/index.ts b/packages/struct/src/index.ts
new file mode 100644
index 00000000..d332e6df
--- /dev/null
+++ b/packages/struct/src/index.ts
@@ -0,0 +1,2 @@
+export * from './struct';
+export { default as Struct } from './struct';
diff --git a/packages/adb/src/utils/struct.ts b/packages/struct/src/struct.ts
similarity index 100%
rename from packages/adb/src/utils/struct.ts
rename to packages/struct/src/struct.ts
diff --git a/packages/struct/tsconfig.json b/packages/struct/tsconfig.json
new file mode 100644
index 00000000..cf5fd431
--- /dev/null
+++ b/packages/struct/tsconfig.json
@@ -0,0 +1,7 @@
+{
+    "extends": "../../tsconfig.base.json",
+    "compilerOptions": {
+        "outDir": "lib", //                       /* Redirect output structure to the directory. */
+        "rootDir": "./src", //                    /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
+    }
+}