Control method of refrigerator

A control method of a refrigerator, according to the present invention, comprises the steps of: 1, sensing the temperature of a storage room; 2, operating a cool air supply means at cooling power when the sensed temperature of the storage room is a first reference temperature or higher; 3, operating the cool air supply means at a delay power, which is lower than the cooling power, when the sensed temperature of the storage room is a second reference temperature, which is lower than the first reference temperature, or lower while the cool air supply means is operating at the cooling power; and 4, operating the cold air supply device at a cooling power or a delay power determined according to the temperature of the storage room, and during the operation of the cold air supply device at the determined cooling power, if the temperature of the storage chamber is equal to or greater than the first reference temperature, allowing the control unit to enable the cool air supply means to operate at the previously deter