Besides the standards of clean level and germ concentration for various clean rooms in clean operating department, other main technical indicators include: static pressure difference, sectional wind speed, air changing frequency, self-cleaning time, temperature, and noise, intensity of illumination and volume of new wind. For air-conditioned clean operating rooms, 85%dust and germs are from air, thus it is critical to clean air in the room. On the other hand, researches and practice have proved that it is not necessary for the whole room to attain the same level of air clean rate for it is rather wasteful .Strengthening contamination control of operating table will get twice the result with half the effort. This is so-called "strengthening the sense of main area?Fence structure is required to be not increasing dust and germs, easy-operating, function-satisfying ,no need to be sophisticated and extravagant