An embodiment is a washing machine including a drum into which laundry is placed, the driving unit rotating the drum according to a control signal; a water supply device for supplying wash water to the drum according to the control signal; a drying device for controlling air circulation in the drum according to a control signal; a sensor for detecting contaminants in the laundry and generating a detection signal; and a control unit generating the control signal, determining the degree of contamination of the laundry according to the detection signal, and performing a washing cycle of the laundry according to the degree of contamination, wherein the control unit performs a pollutant spreading operation before the washing cycle , and the contaminant diffusion operation is an operation of forming a convection phenomenon of air inside the drum so that the contaminants are diffused inside the drum, and supplying the wash water to the laundry according to a preset amount.
展开▼