Abstract: An illumination apparatus with air filtration and ultraviolet sterilization functions includes a cover, a carrier board, and a base. The cover includes a first region, a second region, a third region, a light source, and meshes. The light source is disposed at the second region. The meshes are disposed at the first region and the second region respectively. The carrier board is attached to the cover and includes a plate, a plurality of openings, an ultraviolet light, and a negative ionizer. The openings are formed on the plate for leading air flowing from the meshes. The ultraviolet light is disposed between the openings for sterilizing the flowing air. The negative ionizer is disposed on the plate to generate negative ions in the air. The base is attached to the carrier board and includes a ventilator for providing suction power to lead the flowing air.