This paper analyzes the shortcomings of the existing air conditioning energy-saving design,mainly including the determination of air conditioning load and the lack of energy-saving and environmental protection concepts,and puts forward some specific solutions,such as reasonable design and calculation,design of cold and heat sources in combination with reality,application of frequency conversion energy-saving technology,and reasonable design of fresh air system.These methods can greatly improve the energy-efficiency ratio and operating efficiency of air conditioning,reduce the operating costs of air conditioning,and simultaneously better protect the environment and achieve the goal of sustainable development.