A compressed air energy storage power generation device comprising: an electric motor driven with input power generated by using renewable energy; a compressor mechanically connected to the electric motor and configured to compress air; an accumulator tank fluidly connected to the compressor and configured to store compressed air compressed by the compressor; a pressure sensor configured to detect internal pressure of the accumulator tank; an expander fluidly connected to the accumulator tank and driven with the compressed air; a power generator mechanically connected to the expander and configured to generate power; a first heat exchanger fluidly connected to the compressor and configured to exchange heat between the compressed air supplied from the compressor and a heating medium; a heat storage tank fluidly connected to the first heat exchanger and configured to store the heating medium heat-exchanged by the first heat exchanger; and a second heat exchanger fluidly connected to the accumulator tank and the heat storage tank, the second heat exchanger configured to exchange heat between the compressed air supplied from the accumulator tank and the heating medium supplied from the heat storage tank; characterized in that the compressed air energy storage power generation device further comprises: a power storage device electrically connected to the power generator and configured to store the generated power of the power generator; a first power distributor configured to distribute the generated power of the power generator to at least a power system and the power storage device; and a controller configured to control the first power distributor to supply a part or all of the generated power of the power generator to the power storage device when the internal pressure of the accumulator tank reaches a predetermined pressure and the generated power of the power generator is larger than a power demand in the power system. an electric motor driven with input power generated by using renewable energy; a compressor mechanically connected to the electric motor and configured to compress air; an accumulator tank fluidly connected to the compressor and configured to store compressed air compressed by the compressor; a pressure sensor configured to detect internal pressure of the accumulator tank; an expander fluidly connected to the accumulator tank and driven with the compressed air; a power generator mechanically connected to the expander and configured to generate power; a first heat exchanger fluidly connected to the compressor and configured to exchange heat between the compressed air supplied from the compressor and a heating medium; a heat storage tank fluidly connected to the first heat exchanger and configured to store the heating medium heat-exchanged by the first heat exchanger; and a second heat exchanger fluidly connected to the accumulator tank and the heat storage tank, the second heat exchanger configured to exchange heat between the compressed air supplied from the accumulator tank and the heating medium supplied from the heat storage tank; characterized in that the compressed air energy storage power generation device further comprises: a power storage device electrically connected to the power generator and configured to store the generated power of the power generator; a first power distributor configured to distribute the generated power of the power generator to at least a power system and the power storage device; and a controller configured to control the first power distributor to supply a part or all of the generated power of the power generator to the power storage device when the internal pressure of the accumulator tank reaches a predetermined pressure and the generated power of the power generator is larger than a power demand in the power system. a power storage device electrically connected to the power generator and configured to store the generated power of the power generator; a first power distributor configured to distribute the generated power of the power generator to at least a power system and the power storage device; and a controller configured to control the first power distributor to supply a part or all of the generated power of the power generator to the power storage device when the internal pressure of the accumulator tank reaches a predetermined pressure and the generated power of the power generator is larger than a power demand in the power system.