With the continuous progress of the society, the problem of energy consumption is increasingly prominent, green energy saving is gradually promoted. At present, the combination of green building concept in architectural design has become the common focus of contemporary architectural industry. HVAC is a key link in building energy consumption, which has attracted much attention in recent years. The application of green and energy-saving concepts in building heating and air-conditioning design can not only reduce energy consumption and cost, but also improve operating efficiency, safety and comfort. On the other hand, it not only protects the balance and development of the environment, but also realizes the healthy and sustainable development of air conditioning. It can be said that the green concept in the whole HVAC design of the application is very significant.