A cross-season cold and heat storage system comprises an ice source heat pump (2), an ice making unit (7), a cross-season energy storage tank (8), an energy releasing exchanger (11), an air conditioner pump (12), and a cooling heat storage pump (3). A condenser (21) in the ice source heat pump (2) sequentially communicates with the cooling heat storage pump (3) and a cooling tower (1) via a circulation pipeline, and also sequentially communicates with the cooling heat storage pump (3) and the cross-season energy storage tank (8) via the circulation pipeline, and also sequentially communicates with the air conditioner pump (12) and an air conditioner cold/hot terminal (13) via the circulation pipeline, thereby forming a circulation loop for heating the air conditioner cold/hot terminal (13) in winter. The system realizes cross-season cold and heat storage. Water is made into ice in winter for use in summer cooling, and in addition, heat discharged during cooling in summer is stored for winter heating, greatly reducing operational costs.