The various embodiments herein provide an apparatus for harnessing a wave energy, solar energy and wind energy. The apparatus comprises a floating frame, a base portion connected to the floating frame and at least two linkage units. The two linkage units are a basic linkage unit and a medium linkage unit. The apparatus includes a plurality of floating flaps and at least one power extraction means. A connecting pivot is provided in the linkage units and the base portion. The floating flaps are pivoted vertically on the basic linkage unit and the base portion. The flaps associated with the floating flaps are placed under water against prevailing waves and floats associated with the floating flaps are placed on surface of the water, for absorbing the wave energy from projected portions present at edges and middle portion of the flaps.