To provide a power generation method by which power can be stably supplied without producing any toxic waste or being affected even in a disaster, location conditions are not severely required, and a power generation cost can further be suppressed.

Power obtained from night electric power, solar energy generation and wind-generated power is converted into a direct current which is applied to water via a pole plate so that an electrolysis is applied to the water. As a result, hydrogen and oxygen are produced. Combustion energy generated when they are combined is used to rotate a turbine generator.