It is adopted photo catalyst technology. By using UV-ultraviolet irradiation on titanium dioxide(TIO2),it produces active photo catalyst and hydrogen radicals(-OH) with strong oxidizing power to damage bacterial cell, inhibit virus activity and release propose carbon dioxide and moisture to decompose harmful matter in the air. While the process of disinfecting and deodorizing, by stimulation to mosquito s feeler nerve of the moist carbon dioxide like breath of human beings, attraction of ultraviolet light and the smell of pharmaceutical for mosquito catching, flow of gas and so on, mosquitoes are lured into a net for them where they will be dried to die.