The air quality of the guest rooms in the space cabin homestay mainly depends on the location and ventilation of the rooms. Generally speaking, the indoor air in spacecraft homestays is often circulated and filtered to maintain a good atmosphere purification system. In addition, the breathing, body temperature, and other physiological activities of people living in spacecraft can have a certain impact on the air. So placing an air purifier or turning on an air circulation device in a spaceship homestay is a good way to improve air quality.