A clean room refers to a specially designed workshop that removes pollutants such as particles, harmful air, and bacteria from the air within a certain spatial range, and controls indoor temperature, cleanliness, dew point, indoor pressure, airflow velocity and distribution, noise and vibration, lighting, and static electricity within a certain required range. That is to say, regardless of changes in external air conditions, the indoor environment can maintain the originally set requirements for cleanliness, temperature, humidity, and pressure.