A dual-purpose wash basin is mounted on a washbowl for use and is mainly composed of a wash basin body and a water supply pipe. The dual-purpose wash basin further comprises an air boosting device and an air supply pipe. When washing hands, a user turns on a water switch, the water switch controls a water valve on the water supply pipe to be turned on, and water flows into a water spray pipe and is sprayed into the wash basin body through water spray holes in the wash basin body. Fine water jets are sprayed inwards from the periphery of the wash basin body. The hand washing and spraying range is large in the spraying process, the scouring force is stronger, and more water can be saved. The user turns off the water switch after washing the hands and turns on an air switch, the air boosting device sucks the air, boosts the air and supplies air flow into an air spray pipe through the air supply pipe. The air is sprayed onto the hands through air spray holes in the wash basin body and blows the water on the hands into the wash basin body, and then the water is drained from a drain pipe below the wash basin body. Accordingly, the hands are dried.