A stacker crane is a device that automatically stacks cardboard boxes that have been loaded into containers on pallets and pallets (wood, plastic) in a certain arrangement. It can stack multiple layers and then be pushed out for easy forklift transportation to the warehouse for storage. This device adopts PLC+touch screen control to achieve intelligent operation and management, which is simple and easy to master. It can greatly reduce labor and lower labor intensity. A stacker is an equipment that automatically stacks bags, cardboard boxes, or other packaging materials transported by a conveyor according to customer process requirements, and transports the stacked materials.