In recent years, with China's emphasis on the construction of spiritual civilization, books have gradually become a common item in people's daily life. However, the books in the family bookstore are placed in a mess. In order to meet the needs of book management, realize the intelligence of book management, and improve people's happiness in reading, the introduction of book management robots has become one of the effective ways. The team uses the Huiyu model to design a new type of library management robot, which can realize the rapid classification, borrowing, storage and return of books, with simple operation and strong practicability. In terms of mechanical structure, this work is mainly composed of walking mechanism, lifting mechanism, bionic mechanical arm, rotating mechanism and book box. The lifting device and the bionic mechanical arm can realize height adjustment and rotation of the mechanical arm to ensure that the robot can be applied to book shelves of various heights. The mechanical arm used imitates the joint action of human arm, and the front mechanical claw imitates the pulling and clamping posture of three fingers, which can realize flexible grasping of books. The rotating mechanism realizes the steering of the mechanical arm from the bookcase to the bookcase through the motor and the chain; the robot is equipped with a book box that allows the orderly arrangement of books and the jacking of books. At the same time, the robot uses a book recognition system based on machine vision to effectively identify the information of the taken book, and can effectively identify the specific information of the book according to the bar code of the book, so as to ensure the correct gripping of the book. The obstacle avoidance method combining infrared obstacle avoidance and ultrasonic obstacle avoidance can solve the problem of difficult monitoring of soft interface by ultrasonic waves and the problem of difficult detection of transparent objects by infrared rays. In addition, the robot adopts the navigation method based on road signs, realizes the fixed mark and the robot position sensing, and can correct the robot's forward direction by using the deviation angle. In the production process, team members made a detailed investigation on the reading needs of books, and the book management robot made by using the Huiyu model can realize the process of borrowing and returning books, providing a practical and creative design for intelligent book management. The mechanical structure design of this work meets the requirements of assembly, mechanical properties and appearance, and has a broad market prospect. Through the cooperation of team members, we produced a prototype model, designed a clever mechanical system, and debugged its control system, realized the expected function, and verified the reliability and practicality of the system.