User side compressed air energy storage system and method

The invention provides a user side compressed air energy storage system and method which can be applied to the technical field of compressed air energy storage. The user side compressed air energy storage system comprises an air compression system used for compressing raw material air; the secondary pressurization system is used for pressurizing the compressed air conveyed by the air compression system again; the heat storage and heat exchange system is used for collecting and storing compression heat generated when the air is pressurized by the second-stage pressurization system; the high-pressure air storage system is used for storing the high-pressure air conveyed by the secondary pressurization system; the expansion power generation system is used for heating the high-pressure air stored in the high-pressure air storage system by using the compression heat stored in the heat storage and heat exchange system, driving an air expansion power generator to generate power by using the heated high-pressure air,