A method of controlling a washing machine includes the steps of: processing the laundry by using the water supplied together with detergent; draining the water, rotating the inner tub at a high speed, and operating the pump to drain the water discharged from the laundry; rotating the inner tub at a first speed and supplying the water into the inner tub via the dispenser; stopping the supply of water through the dispenser, rotating the inner tub at a second speed, and supplying the water into the inner tub through the spray nozzle; stopping the supply of water through the spray nozzle and alternately rotating the pulsator at a third speed in both directions; stopping rotation of the pulsator, rotating the inner tub at the second speed, and supplying the water into the inner tub through the spray nozzle; operating the pump to drain the outer tub; and rotating the inner tub at a high speed, and operating the pump to drain the water discharged from the laundry.