ASRS system is also called an elevated library or an elevated warehouse. Generally, it refers to a warehouse that uses several layers, dozens of layers, or even tens of layers of shelf storage unit goods, and uses the corresponding material handling equipment to carry goods into and out of the warehouse.

Composition of ASRS System 
1. High-rise shelf
2. Roadway stacker
3. Conveyor system
4. AGV or RGV
5. Automatic control system
6. WMS