The seafloor template is one of the important equipment for offshore drilling and sampling. It is used for wellhead positioning, drilling tool guiding and clamp stabilization, and wellhead monitoring. It can also be equipped with other tools for cone penetration test, coring, logging, etc. The seafloor template is a device that integrates machinery, hydraulic system, optical fiber communication, and electrical automation. It consists of mechanical structure, hydraulic system and control system. With the working requirements of the seafloor template in mind, this paper proposes a seafloor template control system including drill pipe clamping, video addressing, image acquisition, wellhead information monitoring, etc. The control system, as the core equipment, includes the power distribution system, the photoelectric measurement and control system, and the underwater hydraulic power station.