Recently, the importance of development of clean and reproducible natural energy has been taken notice, for solving global environment problems and energy scarcity problems. Japan is one of the richest countries from the viewpoint of wave energy. However, the most of the energy is not efficient used. Then we studied on new wave power generation system using the gyro moment, In this paper, the background of this study, the generating principle of this system, the first prototype model test and the second prototype model test are described.