To produce new energy by eco-friendly using a flow of a river, by solving the problems wherein hydraulic power generation causes natural disruption since the hydraulic power generation itself requires vast funds and labors for generating electric power by its head by damming up the river by conventionally making a dam, and nuclear power generation is hardly said to completely enable safe use, since use of the sunlight is good but influenced by the weather and wind power is not useful when a strong wind does not always blow, though the use of the sunlight and wind power made great progress as clean and inexhaustible energy, when the problem of global warming and the energy problem such as a sudden rise in prices of fossil fuel become a very serious state.

A float is connected by a chain or a wire rope from a fixed anchor so as not to flow, and electric power is generated by a generator interlocked with this water turbine by rotating the water turbine (a turbine) arranged on its float, and is stored in a storage battery via a transformer, or is transmitted on land by a cable. In this method, equipment funds can be reduced in a relatively small sum without imparting adverse influence on an ecology of the river.