The temperature and humidity of the operating room must be controlled within a certain range, i.e., the temperature is 22~25℃ and the relative humidity is 40%RH~60%RH. Suitable ambient temperature and humidity are very important for both the operator and the patient. When the room temperature exceeds 28 ℃, humidity greater than 70% RH, easy to have stuffy, sweating, irritability, fatigue and other reactions, easy to affect the stability of the mood and agile thinking, so that the operator's technical level can not be well played.