The air duct type air sterilization and deodorization device uses nano photocatalysts as catalytic media to quickly decompose and catalyze harmful bacteria and pollutants in the air, purifying and disinfecting the air. The air duct type air sterilization and deodorization device produces hydroxide ions, super oxygen ions, hydrogen peroxide, and pure negative oxygen ions under broadband wavelength irradiation. After purification, the air is clean and fresh without producing secondary pollutants. It is installed in the supply and return air ducts or the middle section of the centralized central air conditioning unit to achieve centralized purification of indoor air, greatly reducing the risk of cross infection in the room. Gute Environmental Protection Company can customize the size according to the customer's installation site, provide free technical guidance, and jointly complete product installation!