The invention belongs to the technical field of electric energy storage, and particularly relates to a wind power generation and seawater-compressed air energy storage device and method. The device ischaracterized in that a wind power plant 1 is connected with a air compressor transformer 2 and a power grid; the air compressor transformer 2, an air compressor system 3, a cooling heat exchanger 4,a seabed air storage chamber 5, a controller 12, a preheater 6 and a combustion chamber 7 are sequentially connected in series; the combustion chamber 7 is connected with a fuel tank 8 and a fuel gasturbine 9; the fuel gas turbine 9 is connected with an engine 10; the engine 10 is connected with the power grid; and the controller 12 is connected with the seabed air storage chamber 5 and is usedfor controlling the air release amount. The method is characterized in that the seabed air storage chamber 5 fixed to the seabed is used, air is compressed by using the pressure of sea water, meanwhile, the low-temperature seawater is used for cooling the heat-insulating compressed air, thus land space is saved, the compression efficiency is effectively improved, and the energy consumption is reduced.