As an important part of a carrier based Unmanned Aerial Vehicle (UAV) system, to some extent, the launch part of UAV affects the operational effectiveness of UAV system. In order to improve the launching performance and capability of non-war time routine maintenance and storage of the UAV, the design scheme of a carrier-based box-type UAV launch system was presented by aimed at a small carrier-based UAV system. An integrated structure of launching, transmission and storage was used by the system, which was made from large storage transmission box, launch platforms and sliding mechanism. Storage transmission box frame structure was consisted of mechanical frame and pneumatic and hydraulic system components, driven by the PLC controller to implement visible automated transmission. The launch platform was constructed by a 2-D position servo system that driven by AC permanent magnet synchronous servo motor, thereby allowing the system to obtain high precision of transmission and launching in shipboard conditions of swinging and shaking. The design of sliding mechanism, making the launch platform switched between the two storage cabinets, which realized the multi-cabinets of UAV to use in public one same launch platform, and reduced the occupational space of system in the shipboard. The system can effectively improve the ability of UAV maintenance and launching performance.