A method for controlling a refrigerator having a storage room, the method comprising: sensing a temperature of the storage room; operating a cool air supply means (21, 25, 12) such that cool air is supplied to the storage room at a cooling power when the sensed temperature of the storage room is equal to or above a first reference temperature; operating the cool air supply means (21, 25, 12) at a delay power, which is less than the cooling power, when the sensed temperature of the storage room is equal to or below a second reference temperature, which is less than the first reference temperature while the cool air supply means (21, 25, 12) is operating at the cooling power; and allowing a control unit to determine a cooling power (P3, P5, P7) or a delay power (P4, P6) of the cool air supply means (21, 25, 12) according to the temperature of the storage room while the cool air supply means (21, 25, 12) is operating at the delay power, and operating the cool air supply means (21, 25, 12) at the determined cooling power or delay power; wherein the adjustment of a power of the cool air supply means represents an adjustment of powers of one or more of a compressor and a fan motor and adjustment of an opening angle of a damper; characterized in that, when the temperature of the storage room increases to a predetermined temperature that is greater than the second reference temperature while the cool air supply means (21, 25, 12) operates at the delay power, the control unit determines the cooling power (P3, P5, P7) of the cool air supply means (21, 25, 12) by summing the cooling power (P3, P5, P7) and the delay power (P2, P4, P6), which are determined previously, and multiplying by α, and the cool air supply means (21, 25, 12) operates at the determined cooling power (P3, P5, P7), α is greater 0 and less than 1. sensing a temperature of the storage room; operating a cool air supply means (21, 25, 12) such that cool air is supplied to the storage room at a cooling power when the sensed temperature of the storage room is equal to or above a first reference temperature; operating the cool air supply means (21, 25, 12) at a delay power, which is less than the cooling power, when the sensed temperature of the storage room is equal to or below a second reference temperature, which is less than the first reference temperature while the cool air supply means (21, 25, 12) is operating at the cooling power; and allowing a control unit to determine a cooling power (P3, P5, P7) or a delay power (P4, P6) of the cool air supply means (21, 25, 12) according to the temperature of the storage room while the cool air supply means (21, 25, 12) is operating at the delay power, and operating the cool air supply means (21, 25, 12) at the determined cooling power or delay power; wherein the adjustment of a power of the cool air supply means represents an adjustment of powers of one or more of a compressor and a fan motor and adjustment of an opening angle of a damper; characterized in that, when the temperature of the storage room increases to a predetermined temperature that is greater than the second reference temperature while the cool air supply means (21, 25, 12) operates at the delay power, the control unit determines the cooling power (P3, P5, P7) of the cool air supply means (21, 25, 12) by summing the cooling power (P3, P5, P7) and the delay power (P2, P4, P6), which are determined previously, and multiplying by α, and the cool air supply means (21, 25, 12) operates at the determined cooling power (P3, P5, P7), α is greater 0 and less than 1.