There is a tunnel stacker in the center of the berths on both sides, and the operation of the entire garage is completed by the stacker and carrier. When the car is put into storage, the car is parked on the entry and exit platform. The stacker takes the car from the entry and exit platform, walks and lifts it in the roadway, and transports the car to the berth on the designated floor. The carrier on the stacker carries the car from the stacker into the berth. The stacker uses advanced technology to seamlessly integrate the two lifting and walking systems, and is equipped with a frequency conversion control system. It uses laser ranging to walk and locate, and uses optical communication wireless signal transmission to realize the function of lifting and lowering while walking. To save time, Reduce energy consumption and maximize space utilization. The design is based on the principle of automated warehouse, and the storage actions of vehicles are realized in sequence through a multi-dimensional integrated stacker, with high storage capacity.