A wave power station which works on stand-alone stabilization has extensive application prospects at outlying sea area or islands. The automatic control system is one of the key facilities in the station. The composition and principle of the wave power station are introduced. A detailed discussion is made on the structure of the automatic control system， its working principle and process， and hardware and software design. The results of its application show that the wave power station converts the unsteady energy input into the steady electric energy output， realizes optimization control for the energy acquisition systems and charges online.