diff --git a/.gitignore b/.gitignore
index 723ef36..d7c3743 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
-.idea
\ No newline at end of file
+.idea
+*.exe
\ No newline at end of file
diff --git a/cmd/about.go b/cmd/about.go
new file mode 100644
index 0000000..bd272e4
--- /dev/null
+++ b/cmd/about.go
@@ -0,0 +1,28 @@
+package cmd
+
+import (
+	"fmt"
+	"github.com/fatih/color"
+	go_StringBuilder "github.com/golang-infrastructure/go-StringBuilder"
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	rootCmd.AddCommand(aboutCmd)
+}
+
+var aboutCmd = &cobra.Command{
+	Use:   "about",
+	Short: "About this tool github, about author, blabla.",
+	Long:  ``,
+	Run: func(cmd *cobra.Command, args []string) {
+		msg := go_StringBuilder.New().
+			AppendString("\n\n\n").
+			AppendString(fmt.Sprintf("%20s", "Repo")).AppendString(" : ").AppendString("https://github.com/cryptography-research-lab/go-qwerty-cipher\n\n").
+			AppendString(fmt.Sprintf("%20s", "Problem feedback")).AppendString(" : ").AppendString("https://github.com/cryptography-research-lab/go-qwerty-cipher/issues\n\n").
+			AppendString(fmt.Sprintf("%20s", "Author")).AppendString(" : ").AppendString("CC11001100\n").
+			AppendString("\n\n\n").
+			String()
+		color.HiGreen(msg)
+	},
+}
diff --git a/cmd/decrypt.go b/cmd/decrypt.go
new file mode 100644
index 0000000..f89c543
--- /dev/null
+++ b/cmd/decrypt.go
@@ -0,0 +1,54 @@
+package cmd
+
+import (
+	"fmt"
+	"github.com/cryptography-research-lab/go-qwerty-cipher/pkg/qwerty_cipher"
+	"github.com/spf13/cobra"
+)
+
+var ciphertext string
+
+func init() {
+
+	decryptCmd.Flags().StringVarP(&keyboard, "keyboard", "k", "", "custom keyboard")
+	decryptCmd.Flags().StringVarP(&ciphertext, "ciphertext", "c", "", "ciphertext to decrypt")
+
+	rootCmd.AddCommand(decryptCmd)
+}
+
+var decryptCmd = &cobra.Command{
+	Use:   "decrypt",
+	Short: "Decrypt ciphertext using qwerty encryption algorithm",
+	Long:  ``,
+	RunE: func(cmd *cobra.Command, args []string) error {
+
+		keyboardLayout := parseKeyboardLayout(keyboard)
+
+		if err := checkDecryptParams(keyboardLayout, ciphertext); err != nil {
+			return err
+		}
+
+		plaintext, err := qwerty_cipher.Decrypt(ciphertext, keyboardLayout.TransformToDecrypt())
+		if err != nil {
+			return err
+		}
+		fmt.Println("Decrypt Result: " + plaintext)
+		return nil
+	},
+}
+
+// 检查加密所需的参数是否合法
+func checkDecryptParams(keyboardLayout qwerty_cipher.KeyboardLayout, ciphertext string) error {
+
+	// 密文不允许为空
+	if ciphertext == "" {
+		return fmt.Errorf("ciphertext must not empty")
+	}
+
+	// 键盘布局可以不指定，仅当指定的时候才检查布局是否合法
+	if err := keyboardLayout.Check(); err != nil {
+		return fmt.Errorf("keyboard layout %s is not ok: %s", string(keyboardLayout), err.Error())
+	}
+
+	return nil
+}
diff --git a/cmd/encrypt.go b/cmd/encrypt.go
new file mode 100644
index 0000000..c9978de
--- /dev/null
+++ b/cmd/encrypt.go
@@ -0,0 +1,87 @@
+package cmd
+
+import (
+	"fmt"
+	"github.com/cryptography-research-lab/go-qwerty-cipher/pkg/qwerty_cipher"
+	"github.com/spf13/cobra"
+	"strings"
+)
+
+// 可以指定键盘布局
+var keyboard string
+
+// DefaultKeyboardLayout 默认的键盘布局为qwerty布局
+var DefaultKeyboardLayout = qwerty_cipher.QwertyKeyboardLayout
+
+// 要加密的明文
+var plaintext string
+
+func init() {
+
+	encryptCmd.Flags().StringVarP(&keyboard, "keyboard", "k", "", "custom keyboard")
+	encryptCmd.Flags().StringVarP(&plaintext, "plaintext", "t", "", "plaintext to encrypt")
+
+	rootCmd.AddCommand(encryptCmd)
+}
+
+var encryptCmd = &cobra.Command{
+	Use:   "encrypt",
+	Short: "Encrypt plaintext using qwerty encryption algorithm",
+	Long:  ``,
+	RunE: func(cmd *cobra.Command, args []string) error {
+
+		// 解析键盘布局
+		keyboardLayout := parseKeyboardLayout(keyboard)
+
+		// 参数检查
+		if err := checkEncryptParams(keyboardLayout, plaintext); err != nil {
+			return err
+		}
+
+		plaintext, err := qwerty_cipher.Encrypt(plaintext, keyboardLayout)
+		if err != nil {
+			return err
+		}
+		fmt.Println("Encrypt Result: " + plaintext)
+		return nil
+	},
+}
+
+// 解析传入的键盘布局参数，如果没有传的话则使用默认的
+func parseKeyboardLayout(keyboard string) qwerty_cipher.KeyboardLayout {
+
+	// 如果没有指定的话，则使用默认的键盘布局
+	if keyboard == "" {
+		return DefaultKeyboardLayout
+	}
+
+	// 看看是不是预置的几个布局
+	switch strings.ToLower(keyboard) {
+	case "qwerty":
+		return qwerty_cipher.QwertyKeyboardLayout
+	case "qwertz":
+		return qwerty_cipher.QwertzKeyboardLayout
+	case "azerty":
+		return qwerty_cipher.AzertyKeyboardLayout
+	default:
+		// 指定的不是预置的键盘布局，说明是自定义的键盘布局，则直接转为键盘布局使用
+		return qwerty_cipher.KeyboardLayout(keyboard)
+	}
+
+}
+
+// 检查加密所需的参数是否合法
+func checkEncryptParams(keyboardLayout qwerty_cipher.KeyboardLayout, plaintext string) error {
+
+	// 要加密的明文不允许为空
+	if plaintext == "" {
+		return fmt.Errorf("plaintext must not empty")
+	}
+
+	// 键盘布局可以不指定，仅当指定的时候才检查布局是否合法
+	if err := keyboardLayout.Check(); err != nil {
+		return fmt.Errorf("keyboard layout %s is not ok: %s", string(keyboardLayout), err.Error())
+	}
+
+	return nil
+}
diff --git a/cmd/root.go b/cmd/root.go
new file mode 100644
index 0000000..281f6ad
--- /dev/null
+++ b/cmd/root.go
@@ -0,0 +1,37 @@
+package cmd
+
+import (
+	"fmt"
+	"github.com/fatih/color"
+	cc "github.com/ivanpirog/coloredcobra"
+	"github.com/spf13/cobra"
+	"os"
+)
+
+var rootCmd = &cobra.Command{
+	Use:   "qwerty-cipher",
+	Short: "",
+	Long:  ``,
+	Run: func(cmd *cobra.Command, args []string) {
+		_ = cmd.Help()
+	},
+}
+
+func Execute() {
+
+	cc.Init(&cc.Config{
+		RootCmd:  rootCmd,
+		Headings: cc.HiCyan + cc.Bold + cc.Underline,
+		Commands: cc.HiYellow + cc.Bold,
+		Example:  cc.Italic,
+		ExecName: cc.Bold,
+		Flags:    cc.Bold,
+	})
+	// 官方文档没提，但是似乎不加这一句会乱码...
+	rootCmd.SetOut(color.Output)
+
+	if err := rootCmd.Execute(); err != nil {
+		_, _ = fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}
diff --git a/cmd/version.go b/cmd/version.go
new file mode 100644
index 0000000..6edb2b6
--- /dev/null
+++ b/cmd/version.go
@@ -0,0 +1,21 @@
+package cmd
+
+import (
+	"github.com/fatih/color"
+	"github.com/spf13/cobra"
+)
+
+const Version = "v0.1"
+
+func init() {
+	rootCmd.AddCommand(versionCmd)
+}
+
+var versionCmd = &cobra.Command{
+	Use:   "version",
+	Short: "Show the version number of big ip hacker",
+	Long:  ``,
+	Run: func(cmd *cobra.Command, args []string) {
+		color.HiGreen("version %s", Version)
+	},
+}
\ No newline at end of file
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..595ee1f
--- /dev/null
+++ b/main.go
@@ -0,0 +1,7 @@
+package main
+
+import "github.com/cryptography-research-lab/go-qwerty-cipher/cmd"
+
+func main() {
+	cmd.Execute()
+}
diff --git a/pkg/qwerty_cipher/layout.go b/pkg/qwerty_cipher/layout.go
index df25e1b..506862f 100644
--- a/pkg/qwerty_cipher/layout.go
+++ b/pkg/qwerty_cipher/layout.go
@@ -4,8 +4,8 @@ package qwerty_cipher
 // 具体的例子详见 QwertyKeyboardLayout 实现
 type KeyboardLayout []rune
 
-// 检查当前的键盘布局映射表是否合法
-func (x KeyboardLayout) check() error {
+// Check 检查当前的键盘布局映射表是否合法
+func (x KeyboardLayout) Check() error {
 
 	// 如果长度都不对，则没必要继续下去了
 	if len(x) != 26 {
diff --git a/pkg/qwerty_cipher/qwerty.go b/pkg/qwerty_cipher/qwerty.go
index 6e3e502..ab2c0c4 100644
--- a/pkg/qwerty_cipher/qwerty.go
+++ b/pkg/qwerty_cipher/qwerty.go
@@ -10,7 +10,7 @@ func Encrypt(plaintext string, keyboardLayout ...KeyboardLayout) (string, error)
 	keyboardLayout = variable_parameter.SetDefaultParam(keyboardLayout, QwertyKeyboardLayout)
 
 	// 参数校验
-	if err := keyboardLayout[0].check(); err != nil {
+	if err := keyboardLayout[0].Check(); err != nil {
 		return "", err
 	}