To generate electric power using a river stream and tidal current of the sea as electric energy and prevent an electric power plant performing permanent movement by utilizing hydraulic power from necessitating fuel.

Hydraulic power generation is performed by attaching a float to a hydraulic turbine with a head tank and a self-running transportation device constituted by installing the hydraulic turbine with the head tank and the self- running transportation device in a river and tidal current of the sea, developing rotary and circular movement of the hydraulic turbine used on a surface of water in the river to use the rotary and circular movement together with horizontal movement, and enlarging the scale of the hydraulic turbine which cannot be technically enlarged using a hydraulic turbine plate (hydraulic turbine vane) as the head tank to generate electric power.