Automated storage and retrieval systems is always know as AS/RS or ASRS systems. The automatic storage system including the controlled software, computers, and stacker cranes, handling equipment,conveyor system, storing system, WMS/WCS and retrieving system in a warehouse. Taking full advantage of limited land, ASRS system increases the space utilization as a main purpose.The utility rate of ASRS system is 2-5 times of the normal warehouses.