A refrigerator includes a body having a cooling chamber and a door configured to open and close at least a portion of the cooling chamber. The refrigerator also includes a water source positioned at the cooling chamber or the door and configured to accommodate water. The refrigerator further includes a hot water supply unit positioned at the body or the door and configured to receive water from the water source, heat the water, and supply the heated water to outside of the body in response to a start signal. In addition, the refrigerator includes a hot water transferring unit that is connected to the hot water supply unit and configured to transfer the water remaining in the hot water supply unit after supplying the heated water to outside of the body is completed.