The operating room is sterilized every day. The operating room is a dedicated place for surgical treatment of patients and is the key department in the hospital where important medical and nursing skills and instruments and equipment are brought together. In order to ensure the quality and safety of surgery, the operating room establishes the most stringent sterilization and aseptic management system in the hospital to ensure the high efficiency and quality of surgery. However, wherever the scope of the area of strict management of hospital sensory, are to carry out zoning management, operating room aseptic management requirements are stringent, disinfection and isolation is nearly harsh. Normally, the operating room is divided into three areas according to cleanliness: clean area, quasi-clean area and non-clean area. Zoning management can effectively reduce the mutual interference between the zones, so that the air quality of the operating room in each zone to meet the required operating room air purification standards, to prevent cross-infection in the hospital.