Reduce the energy consumption of the air conditioning system as much as possible, especially the comfort. The impact of the air conditioning system on the human body is the cold and hot feeling of the human body on the environment through air temperature, humidity, wind speed and average radiation temperature. In the past, the control method of air conditioning was only to measure and control the temperature and humidity of the air, even the temperature of the air. Obviously, this method is not comprehensive enough and will bring many problems. For example, the air conditioning system has no direct impact on the human body, the control of the environment is not fast when the environment changes, and the human body feels uncomfortable. The air conditioning system can not save energy in this way. The application of the research results of humid and hot environment provides a theoretical basis for us to adopt new control methods. If the comfort evaluation index, i.e. human sensory index, is used as the control parameter of the air conditioning system, if the PMV or set * index is used to control the air conditioning system, it can not only solve the problems existing in the traditional control methods, but also save energy to a great extent. The preliminary research shows that, Using this control method, the air conditioning system can save about 30% energy under human comfort conditions.