The principle of Amazon shelf is mainly based on robot technology and Internet of Things technology to realize automated warehouse management. Specifically, the workflow of Amazon shelf is as follows:

1. Goods entering the warehouse: When new goods enter the warehouse, the operator puts the goods on the transport tray and then lets the robot transport the transport tray to the corresponding warehouse.

2. Shelf storage: When storing products, the robot will determine their location by scanning the QR code of the product and store them in the corresponding shelf space.

3. Order acquisition: When a customer places an order, the system will specify the location of the required goods based on the order information.

4. Grab the product: After obtaining the order information, the robot will move to the target shelf and use a mechanical arm or clamp to grab the required goods.

5. Packing and outbound: The robot will send the goods to be shipped to the packaging area, and the workers will pack and outbound process them.

The entire process involves the coordinated use of multiple technologies such as robot navigation, product classification, and vehicle-mounted sensors to efficiently realize the storage, loading and retrieval functions of goods. By adopting Internet technology, Amazon shelves have achieved a convenient, fast and low-cost product distribution model, providing customers with a better service experience.