A closed washbasin mainly comprises a washbasin body and a water supply pipe. The washbasin body is mounted in a hole reserved in a countertop, the water supply pipe is communicated with a water source and provided with a water valve, more than one atomizing nozzle is arranged on the inner wall of a counter, the water supply pipe at a downstream position of the water valve is provided with water distribution pipes as many as the atomizing nozzles, and each water distribution pipe is communicated with one corresponding atomizing nozzle. Compared with a mode of washing with water flowing from top to bottom, a mode of spraying mist to hands from two sides of the inner wall of the washbasin has advantages that a mist coverage area is increased, and identical washing effects can be achieved with low water consumption in same time duration, so that water saving can be realized; in addition, a spraying angle can be adjusted according to requirements; after washing, fans start to suck air fromthe interior of the washbasin, and the air is heated and then blown to hands from air outlets in two sides of the washbasin to dry the hands. The closed washbasin has advantages that by functional integration of washing and drying, space saving and practicality are realized.