The present invention concerns the method and installation to apply ocean energy to power generation. It is consisted of the floater, lever, chain, ratchet wheel, flywheel, generator, cable, etc. It is characterized by the fact that the float and weight fixed to it move up and down with the motion of wave, which drive the strength enlargement mechanism made up of a number of levers to travel alternately and pull the heavy flywheel to rotate constantly. By this way, the generator runs and yields electricity. The present invention has simple structure and high efficiency and can easily increase or decrease the enlargement mechanism according to the capacity of generation. This installation with low cost can be widely utilized for pollution-free power generation in the coast.