In view of the ubiquitous parking problem in the city, a double-layer intelligent parking garage that saves space, is smart and labor-saving. On the basis of the existing parking garage, the first problem to be solved is how to effectively use the transitional parking space in the three-dimensional garage (mainly refers to the parking space that the vehicle cannot be occupied by the upper vehicle after parking). In order to solve the above problems, this paper designed a double-deck parking garage to solve this problem. Mainly by the left and right lateral movement and vertical movement of the lower parking space. All parking spaces are free to move up and down to ensure that the lower parking space can be fully loaded without affecting the upper parking vehicle. Based on Huiyu’s innovative technology, a double-layer intelligent parking garage was designed. The Huiyu model is used to complete the mechanical system design and production of physical models. The man-machine operation panel is compiled with ROBO PRO software. With button-type access, it has the function of non-slip and stable operation. At the same time, the optimal path algorithm saves time. The double-decker smart parking garage is safe, small, efficient and intelligent. It can park and pick up the car with a key. The double-deck parking garage achieves maximum use of space and is both reliable and economical. The double-deck intelligent parking garage is designed to meet the desired sporting requirements, removing the upper vehicle while ensuring that the vehicle’s bottom layer does not move. At the same time, the optimal path algorithm makes it a powerful guarantee for fast access to vehicles. The double-layer intelligent parking garage designed and built has met the design requirements. Further improvement is to transform from Huiyu model to actual product, and it is necessary to solve the problem of parking garage bearing.