Sterile room: the area where microorganisms are mainly controlled, and it is generally necessary to carry out environmental disinfection and sterilization regularly. Because microorganisms are mostly attached to dust particles, dust particles should also be controlled in general. Commonly used in pharmaceutical industry.
Clean room: it mainly controls the number of dust particles, needs air purification, does not need environmental disinfection and sterilization, and is often used in the electronics industry.
Biosafety cabinet: it is often used for operations that contact pathogenic microorganisms, and it is isolated from the outside and operators to prevent the spread and pollution of internal microorganisms.
According to my personal understanding, I hope I can help you.