The invention discloses an energy storage air conditioning system which comprises a water tank, a throttle valve, an evaporimeter, an air conditioner heat exchanger and a compressor, a condenser is arranged in the water tank, the compressor is connected with the condenser through a first pipeline, the condenser is connected with the throttle valve through a second pipeline, the throttle valve is connected with the evaporimeter through a third pipeline, the evaporimeter is connected with the air conditioner heat exchanger through a fourth pipeline, the air conditioner heat exchanger is connected with the compressor through a sixth pipeline, the fourth pipeline is provided with a first circulating pump and a first solenoid valve, the fourth pipeline is connected with a cold accumulation trough through a fifth pipeline, the cold accumulation trough is connected with the sixth pipeline through a seventh pipeline, the sixth pipeline is provided with a second circulating pump, the second circulating pump is located at the connection joint between the seventh pipeline and the sixth pipeline at the side close to the air conditioner heat exchanger, the fifth pipeline is provided with a second solenoid valve. The cold accumulation device is added for the energy storage air conditioning system for storing the cooling capacity and saving the energy source.