The aseptic room is usually a small room specially set up in the microbiology laboratory. The area should not be too large, about 4m2 ~ 5m2, and about 2.5m high. A buffer room, clean air shower room and dressing room should be set up outside the sterile room. Sterile room and buffer room should be sealed. Indoor equipment should be equipped with air filtering device. The ultraviolet lamp is installed in the aseptic room and buffer room, and the ultraviolet lamp in the aseptic room is 1m away from the working table. The floor and wall of aseptic room should be flat, not easy to store dirt and easy to clean. The worktable should be in a horizontal state. When entering the sterile room, the staff should wear sterilized clothes, hats and shoes in the changing room, go through the purification air shower room, and then go to the buffer room, and then enter the sterile room for inspection. Small ultra clean worktable is often used in the laboratories of county-level enterprises. The ultra clean worktable is simple in structure and easy to move. There are ultraviolet lamps and purification fans in the working table, and the outside is a small push-pull door or a glass door with two holes. When operating, you can stretch your arms in.