NOVELTY - A wind power generation system capable of accumulating energy is provided to facilitate installation and application even if not narrow or hilly areas by storing rotary power of rotary wings as potential energy of a weight and generating electricity by the potential energy and to easily maintain and repair by installing a power generator and a motor at a lower part.    DETAILED DESCRIPTION - A wind power generation system capable of accumulating energy is composed of rotary wings(10) rotated by the wind; a hydraulic pump(20) for applying high pressure to actuating fluid by the rotation of the rotary wings; a hydraulic line(40) for passing the high-pressure actuating fluid; first and second hydraulic motors(60a,60b) for generating rotary power by the high-pressure actuating fluid fed through the hydraulic line; first and second hydraulic control valves(50a,50b) branched from the hydraulic line to control the supply of the high-pressure actuating fluid by the hydraulic motors; first and second wire bobbins(70a,70b) rotated by the hydraulic motors to take up or unroll a wire(80); a fixed roller(100) separated from the wire bobbins at predetermined height to pass the wire; a fixed roller anti-reverse rotation unit installed at the fixing roller to prevent the fixed roller from being rotated reversely; a weight(110) rectilinearly moving among the wire bobbins and the fixing roller and having a moving roller(120) passing the wire; first and second maximum height sensors(130a,130b) for detecting the maximum height of the weight; first and second minimum height sensors(140a,140b) for sensing the minimum height of the weight; first and second power generators(150a,150b) for generating electricity by receiving rotary power of the wire bobbins; first and second clutches(160a,160b) mounted in each space between the hydraulic motors, between the wire bobbins, and between the power generators to the transmission of rotary power; a control unit(170) for controlling the hydraulic control valves, the fixed roller anti-reverse rotation unit, and the clutches; a speed increaser(30) arranged at each space between the rotary wing and the hydraulic pump, between the wire bobbins, and between the power generators to increase the rotary power of the rotary wings and the wire bobbins; and a reducer(90) mounted in each space between the hydraulic motors and the wire bobbins to decrease rotary power of the hydraulic motors.