The photocatalyst (light catalyst) is the general term of semi-light materials which have photochemical catalysis functions, and it takes Tio2 as the representative. Under the illumination of light, photocatalyst produces ions and pores, and thus has a very strong function of photooxidation and deoxidization, and it can oxidate and decompose all kinds of organic pollutants of different sizes. It also has strong functions as sterilization, bacterium-suppression, deodorization, antipollution and anti- ultraviolet ray. It has strong functions as sterilization, bacterium-suppression, deodorization, antipollution and anti- ultraviolet ray. The anions producing and sending machine is developed on the foundation of static electricity treatment. As close attention has been paid to environmental pollution, this kind of air purification machines and anionic health-caring products emerge as the times require. Its operational principle is to discharges 5 to the 7KV direct negative current of high pressure on a metal needle or a piece of carbonized textile fiber, and then the anions, produced by the air near the needle\'\'s tip, cause the dust particles, pollen and smog etc. to be electrified with negative charges, and thus easy to subside, and further purify the air indoors with the method of subsiding the dust particles, and provide you with fresh air. The combination of photocatalyst and anions, strengthens the sterilization, bacterium-suppression, deodorization and antipollution functions of this photocatalystic anionic energy-saving lamp, and thus brings you a clear and fresh living environment, saves you energy, keeps you healthy as well.