A lamp structure includes a casing, a circulation module, a power supply module, a light emitting module, an air vent, and a filter. A nano antiviral material composed of titanium dioxide and nanosilver is coated onto the filter installed at a lower end portion of the lamp structure, and the air circulation device is provided for obtaining fresh clean air after the air is filtered by the nano antiviral material and the filter, so as to achieve the effects of purifying air, deodorizing, resisting viruses and bacteria, and removing pollutants from the environment effectively for the area irradiated by the light of the lamp.
