diff --git a/book/v3/controllers/book.go b/book/v3/controllers/book.go
index 45a0f79..0c46dd6 100644
--- a/book/v3/controllers/book.go
+++ b/book/v3/controllers/book.go
@@ -6,12 +6,20 @@ import (
 	"122.51.31.227/go-course/go18/book/v3/config"
 	"122.51.31.227/go-course/go18/book/v3/exception"
 	"122.51.31.227/go-course/go18/book/v3/models"
+	"122.51.31.227/go-course/go18/skills/ioc"
 	"gorm.io/gorm"
 )
 
-var Book = &BookController{}
+func GetBookService() *BookController {
+	return ioc.Controller.Get("book_controller").(*BookController)
+}
+
+func init() {
+	ioc.Controller.Registry("book_controller", &BookController{})
+}
 
 type BookController struct {
+	ioc.ObjectImpl
 }
 
 func NewGetBookRequest(bookNumber int) *GetBookRequest {
diff --git a/book/v3/controllers/book_test.go b/book/v3/controllers/book_test.go
index 4a5fcac..48f4987 100644
--- a/book/v3/controllers/book_test.go
+++ b/book/v3/controllers/book_test.go
@@ -12,7 +12,7 @@ import (
 )
 
 func TestGetBook(t *testing.T) {
-	book, err := controllers.Book.GetBook(context.Background(), controllers.NewGetBookRequest(3))
+	book, err := controllers.GetBookService().GetBook(context.Background(), controllers.NewGetBookRequest(3))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -20,7 +20,7 @@ func TestGetBook(t *testing.T) {
 }
 
 func TestCreateBook(t *testing.T) {
-	book, err := controllers.Book.CreateBook(context.Background(), &models.BookSpec{
+	book, err := controllers.GetBookService().CreateBook(context.Background(), &models.BookSpec{
 		Title:  "unit test for go controller obj",
 		Author: "will",
 		Price:  99.99,
diff --git a/book/v3/controllers/comment.go b/book/v3/controllers/comment.go
index 0406170..1a59a6f 100644
--- a/book/v3/controllers/comment.go
+++ b/book/v3/controllers/comment.go
@@ -19,7 +19,7 @@ type AddCommentRequest struct {
 func (c *CommentController) AddComment(ctx context.Context, in *AddCommentRequest) (*models.Comment, error) {
 	// 业务处理的细节
 	// 多个业务模块 进行交互
-	book, err := Book.GetBook(ctx, NewGetBookRequest(in.BookNumber))
+	book, err := GetBookService().GetBook(ctx, NewGetBookRequest(in.BookNumber))
 
 	// if exception.IsApiException(err, exception.CODE_NOT_FOUND) {
 
diff --git a/book/v3/handlers/book.go b/book/v3/handlers/book.go
index 5fa786a..eba05db 100644
--- a/book/v3/handlers/book.go
+++ b/book/v3/handlers/book.go
@@ -114,7 +114,7 @@ func (h *BookApiHandler) createBook(ctx *gin.Context) {
 		return
 	}
 
-	book, err := controllers.Book.CreateBook(ctx.Request.Context(), bookSpecInstance)
+	book, err := controllers.GetBookService().CreateBook(ctx.Request.Context(), bookSpecInstance)
 	if err != nil {
 		response.Failed(ctx, err)
 		return
@@ -131,7 +131,7 @@ func (h *BookApiHandler) getBook(ctx *gin.Context) {
 		return
 	}
 
-	book, err := controllers.Book.GetBook(ctx, controllers.NewGetBookRequest(int(bnInt)))
+	book, err := controllers.GetBookService().GetBook(ctx, controllers.NewGetBookRequest(int(bnInt)))
 	if err != nil {
 		response.Failed(ctx, err)
 		return
diff --git a/skills/ioc/README.md b/skills/ioc/README.md
new file mode 100644
index 0000000..ccc319f
--- /dev/null
+++ b/skills/ioc/README.md
@@ -0,0 +1,5 @@
+# ioc
+
+![alt text](image.png)
+
+# 没有Ioc
\ No newline at end of file
diff --git a/skills/ioc/image.png b/skills/ioc/image.png
new file mode 100644
index 0000000..2a78271
Binary files /dev/null and b/skills/ioc/image.png differ
diff --git a/skills/ioc/interface.go b/skills/ioc/interface.go
new file mode 100644
index 0000000..27f0ea6
--- /dev/null
+++ b/skills/ioc/interface.go
@@ -0,0 +1,35 @@
+package ioc
+
+var containers = []Contaienr{
+	Api,
+	Controller,
+	Config,
+	Default,
+}
+
+func Init() {
+	for _, c := range containers {
+		if err := c.Init(); err != nil {
+			panic(err)
+		}
+	}
+}
+
+// ioc 容器功能定义
+type Contaienr interface {
+	Registry(name string, obj Object)
+	Get(name string) Object
+	// 初始化所有已经注册的对象
+	Init() error
+}
+
+// 注册对象的约束
+type Object interface {
+	Init() error
+}
+
+type ObjectImpl struct{}
+
+func (o *ObjectImpl) Init() error {
+	return nil
+}
diff --git a/skills/ioc/map.go b/skills/ioc/map.go
new file mode 100644
index 0000000..8c4f483
--- /dev/null
+++ b/skills/ioc/map.go
@@ -0,0 +1,38 @@
+package ioc
+
+var Api = NewMapContainer("api")
+var Controller = NewMapContainer("controller")
+var Config = NewMapContainer("config")
+var Default = NewMapContainer("default")
+
+func NewMapContainer(name string) Contaienr {
+	return &MapContainer{
+		name:    name,
+		storage: map[string]Object{},
+	}
+}
+
+// ioc 容器
+type MapContainer struct {
+	name    string
+	storage map[string]Object
+}
+
+func (m *MapContainer) Registry(name string, obj Object) {
+	m.storage[name] = obj
+}
+
+func (m *MapContainer) Get(name string) Object {
+	return m.storage[name]
+}
+
+// 初始化所有已经注册的对象
+func (m *MapContainer) Init() error {
+	for _, v := range m.storage {
+		if err := v.Init(); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}