At present, people obtain electricity by building dams on rivers and building hydropower stations, but there are few places on the earth suitable for dams, and dams will also destroy the ecological environment. In contrast, the surface of the earth covered by the ocean. The waves on the sea are rolling, Day and night, there is a huge amount of energy, the collection of wave energy is suitable for a wide sea area, and the ecological environment is less damaged. 
collecting wave energy for power generation will have more advantages than building a dam on a river.
It is estimated that the wave energy that can be developed and utilized in the world is up to 2.5 TW. At present, some low-power wave energy equipment has been promoted to be used in navigation buoys, lighthouses, etc.