This product is an air disinfection and purification device, mainly composed of a metal shell, a metal pre-filter, an electrostatic adsorption unit, a HEPA filter element, an activated carbon filter, an ultraviolet-photocatalyst sterilization system, a negative ion generator and a fan system. Driven by the fan, indoor air enters the device through the air inlet and passes through the electrostatic adsorption unit, HEPA filter element, activated carbon filter and ultraviolet-photocatalyst sterilization system in sequence. Multi-stage synergistic action achieves air purification and disinfection, effectively removing particulate matter and harmful gases, as well as inactivating bacteria and other microorganisms in the air.