The invention provides a library including a control management center, a borrowing terminal, a smart bookshelf, a video recognition machine, a sorting system, and an access control system. When a target book is not in the library, the date of return of the target book is displayed. A borrower can enter relevant information by inputting a mobile phone number. The control management center, when detecting that the book is on the bookshelf rack or in the library, communicates with an external network communication platform and sends to the borrower the specific location information of the book.The video recognition machine checks the damage to the book to determine whether the book is damaged and whether compensation is required. When it is detected that all books are successfully borrowedand a human body infrared sensor detects a human body, the access control system opens an intelligent access control device to release the reader. When it is detected that a book is not successfully borrowed, the access control system does not open the intelligent access control device and gives an alarm through the alarm device.