Automated Storage and Retrieval System (AS/RS) is an intensive storage system that realizes automatic access to goods by assembly racks, stackers, conveying equipment, palletizing equipment, handling equipment, etc. The automatic three-dimensional warehouse has high space utilization rate and high storage density. High automation brings that the improvement of the efficiency of goods entering and leaving the warehouse, the reduction of labor, storage and transportation costs, and the high safety and stability. It is widely used in vary industries.