Air is one of the most basic elements of the survival of all living things in the world. Statistics show that an adult needs to breathe more than 20,000 times a day (13-15 kg of air). Equivalent to 10 times times the amount of food an adult needs in a day, or 3 times times as much as water. The quality of air has a very close and direct relationship with human life and health. In modern society, people spend about 90% of their time indoors (at home, in the office or in public places, etc.), while indoor air pollution is 5 times or even 10 times times greater than outdoors. Bacteria, dust, mites, nicotine, harmful gases and so on are constantly released from the building and decorative materials, such as: formaldehyde, ammonia and so on, all these floats will endanger human health. Often lead to premature aging, insomnia, forgetfulness, worse can even lead to asthma, heart disease, lung disease, or other fatal conditions. Indoor air pollution is listed by the World Health Organization as one of the 10 factors that endanger human health.