Comply with relevant regulations of domestic and international high protection laboratories. The surface wind speed of the fume hood is constant at 0.5 m/s, and the negative pressure control in the room is always maintained, which avoids potential safety hazards caused by air spills inside the space. Through optimized design, laboratory safety performance is greatly improved and energy consumption is reduced. At the same time, it can also regulate the air humidity and pressure value of each area，reduce noise, and enhance the comfort of laboratory working environment.