Ice storage is one of the important green energy-saving technologies in the air conditioning industry. Based on the increasing cooling load demand of the exhibition hall and the energy-saving demand, this paper studies how to promote green and sustainable development from the perspective of energy-saving and capacity increase reform of the ice storage system in the museum. Taking China Science and Technology Museum as an example, after the reform, the electricity saving rate of theoretical calculation and actual operation in July is 31.26% and 31.8% respectively. The annual energy saving rate, annual electricity saving rate, and annual cooling capacity increase rate are 45%, 33%, and 28% respectively. The capacity increase reform is very effective in green energy saving and sustainable development. Finally, the energy-saving transformation strategy of the ice storage system in the museum is further discussed from the perspective of different cold storage technologies and the energy-saving of other components of the ice storage system.