The technology uses dielectric barrier discharge to act on oxygen and water vapor in the air, so that a high concentration and unstable plasma field of positive and negative oxygen ions and hydroxyl radicals is formed on the surface of the generator. A large number of basic chemical bonds are destroyed after the microorganisms, VOCs, TVOCs and odors in the air pass through the ion field. Under the action of the high static pressure of EBM large air volume fan, the air continues to run downward and passes through the medium and HEPA high efficiency filters. The particles above 0.3 microns are adsorbed, the large particle aerosols suspended in the air are completely filtered, and after filtering, they enter the high-density activated carbon layer. Most of the hydrophilic-based substances and destroyed VOCs and TVOCs are adsorbed. The remaining destroyed odors, microorganisms and other substances will eliminate and die instantly after entering the special wavelength ultraviolet and photocatalyst processing units.