The complete hydraulic system provided by Hengli for the wave energy power generation device has strong pressure-bearing energy and anti-corrosion ability. Also, the system is stable and reliable. The input of this system is continuous unstable two-way force (wave energy). The generated energy drives the hydraulic cylinder to move and converts the mechanical energy into hydraulic energy and stores it in the accumulator. When the accumulator reaches a certain amount of energy, it releases energy to push the hydraulic motor and generator to generate electricity in this cycle to provide energy for the power generation device safely and efficiently to meet various sea wave conditions.