A method for controlling a refrigerator having a storage room, the method comprising: sensing (S1) a temperature (T) of the storage room; operating (S3) a cool air supply means such that cool air is supplied to the storage room at a cooling power (P1) when the sensed temperature (T) of the storage room is equal to or above a first reference temperature (S2); operating (S6) the cool air supply means at a delay power (P2), which is less than the cooling power (P1), when the sensed temperature (T1) of the storage room is equal to or below a second reference temperature (S5), which is less than the first reference temperature while the cool air supply means is operating at the cooling power (PI); and allowing (S8) a control unit to determine a cooling power (P3, P5, P7) or a delay power (P4, P6) of the cool air supply means according to the temperature (T2) of the storage room while the cool air supply means is operating at the delay power (P2), and operating (S9) the cool air supply means 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 (T2) of the storage room increases to a predetermined temperature that is greater than the second reference temperature while the cool air supply means operates at the delay power (P2), the control unit determines the cooling power (P3, P5, P7) of the cool air supply means 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 operates at the determined cooling power (P3, P5, P7), α is greater 0 and less than 1. sensing (S1) a temperature (T) of the storage room; operating (S3) a cool air supply means such that cool air is supplied to the storage room at a cooling power (P1) when the sensed temperature (T) of the storage room is equal to or above a first reference temperature (S2); operating (S6) the cool air supply means at a delay power (P2), which is less than the cooling power (P1), when the sensed temperature (T1) of the storage room is equal to or below a second reference temperature (S5), which is less than the first reference temperature while the cool air supply means is operating at the cooling power (PI); and allowing (S8) a control unit to determine a cooling power (P3, P5, P7) or a delay power (P4, P6) of the cool air supply means according to the temperature (T2) of the storage room while the cool air supply means is operating at the delay power (P2), and operating (S9) the cool air supply means 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 (T2) of the storage room increases to a predetermined temperature that is greater than the second reference temperature while the cool air supply means operates at the delay power (P2), the control unit determines the cooling power (P3, P5, P7) of the cool air supply means 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 operates at the determined cooling power (P3, P5, P7), α is greater 0 and less than 1. <EOS>