The invention discloses an energy-saving type ice storage air conditioning system and an ice crushing device. The energy-saving type ice storage air conditioning system comprises an ice maker, an airconditioning heat exchanger, a water storage tank and a control system; the control system comprises a control machine; the input end of the control machine is connected with mains supply; an off-peaktiming regulator is arranged between a mains supply circuit and the control machine; the control machine is connected with a temperature sensor; the temperature sensor is connected with the air conditioning heat exchanger; an A/D converter is arranged between the control machine and the temperature sensor; the ice maker is connected with an ice storage tank; the ice storage tank is provided withthe ice crushing device; the ice storage tank is connected with the air conditioning heat exchanger through a first pipeline; an inlet and an outlet of the air conditioning heat exchanger are connected with a circulating pipeline; the outlet end of the air conditioning heat exchanger is connected with the water storage tank through a second pipeline; a heat exchange pipe is arranged in the water storage tank; and the water storage tank is connected with the ice storage tank through a third pipeline. According to the energy-saving type ice storage air conditioning system and the ice crushing device, the off-peak power consumption can be realized, the cost of power consumption is reduced, the cooling capacity can be fully and effectively utilized, and the temperature adjustment efficiency ofthe air conditioning system is improved.