A method of controlling a laundry treating machine including: a tub to receive wash water, a drum rotatably provided in the tub, an air supply device circulating air along an air circulation path to supply air to the tub, a lint filter positioned in the air circulation path to filter lint from the air circulated by the air supply device, a filter cleaning unit to supply cleaning water to the lint filter to remove the lint from the lint filter, a wash water supply unit to supply the wash water to the tub, a cooling water supply unit to supply cooling water to an inner surface of the tub such that moisture contained in the circulated air is condensed at the inner surface of the tub, and a valve assembly including a water supply valve to control a supply of wash water to the tub, a cleaning water valve to control a supply of cleaning water to the filter cleaning unit, and a cooling water valve to control a supply of cooling water to the cooling water supply unit, the laundry treating machine is configured to perform a washing cycle, a rinsing cycle, a spin-drying cycle and a drying cycle, the method comprising: supplying the wash water to the wash water supply unit by opening the water supply valve during the washing cycle or the rinsing cycle; supplying the cooling water to the cooling water supply unit by opening the cooling water valve during the drying cycle; and supplying cleaning water to the filter cleaning unit by opening the cleaning water valve before or after the drying cycle. a tub to receive wash water, a drum rotatably provided in the tub, an air supply device circulating air along an air circulation path to supply air to the tub, a lint filter positioned in the air circulation path to filter lint from the air circulated by the air supply device, a filter cleaning unit to supply cleaning water to the lint filter to remove the lint from the lint filter, a wash water supply unit to supply the wash water to the tub, a cooling water supply unit to supply cooling water to an inner surface of the tub such that moisture contained in the circulated air is condensed at the inner surface of the tub, and a valve assembly including a water supply valve to control a supply of wash water to the tub, a cleaning water valve to control a supply of cleaning water to the filter cleaning unit, and a cooling water valve to control a supply of cooling water to the cooling water supply unit, the laundry treating machine is configured to perform a washing cycle, a rinsing cycle, a spin-drying cycle and a drying cycle, the method comprising: supplying the wash water to the wash water supply unit by opening the water supply valve during the washing cycle or the rinsing cycle; supplying the cooling water to the cooling water supply unit by opening the cooling water valve during the drying cycle; and supplying cleaning water to the filter cleaning unit by opening the cleaning water valve before or after the drying cycle. supplying the wash water to the wash water supply unit by opening the water supply valve during the washing cycle or the rinsing cycle; supplying the cooling water to the cooling water supply unit by opening the cooling water valve during the drying cycle; and supplying cleaning water to the filter cleaning unit by opening the cleaning water valve before or after the drying cycle.