The paper analyzes the energy-saving mode in hot summer and cold winter area through simulating and comparing the unique climate conditions and energy-using mode in this region, which are different from the northern heating areas. In hot summer and cold summer areas, the current per unit area value of heating electricity is low in urban residences, but it is based on the low heating temperature value and intermittent heating approach, and the energy consumption grows with the development of economy and the improvement of people's living standard. According to the regional climate characteristics and living mode, the decentralized efficient heating modes based on various pumps should be developed instead of central heating or central heating and cooling system.