A method of controlling humidity in a refrigerating chamber of a refrigerator, the refrigerating chamber having a high moisture preservation mode and a normal moisture preservation mode characterized in that, the method comprises steps of: judging a moisture preservation mode in which the refrigerating chamber being operated, detecting a temperature of the refrigerating chamber and comparing the detected temperature of the refrigerating chamber with a first predetermined temperature, when the refrigerating chamber being operated in the high moisture preservation mode, operating a compressor and a fan of the refrigerator to cool the refrigerating chamber, when the temperature of the refrigerating chamber being higher than or equal to the first predetermined temperature, stopping the compressor, continuously operating the fan and defrosting an evaporator of the refrigerator, so as to humidify the refrigerating chamber via the fan by using a defrostation water of the evaporator, when the temperature of the refrigerating chamber being lower than or equal to a second predetermined temperature, detecting a temperature of the evaporator, stopping the fan and defrostation of the evaporator so as to stop humidifying the refrigerating chamber with the defrostation water, when the detected temperature of the evaporator being higher than or equal to a third predetermined temperature; detecting the temperature of the refrigerating chamber and comparing the detected temperature of the refrigerating chamber with the first predetermined temperature, when the refrigerating chamber being operated in the normal moisture preservation mode, operating the compressor and the fan of the refrigerator to cool the refrigerating chamber, when the temperature of the refrigerating chamber being higher than or equal to the first predetermined temperature, stopping the compressor and the fan when the temperature of the refrigerating chamber being lower than or equal to the second predetermined temperature, wherein the first predetermined temperature is higher than the second predetermined temperature, and the third predetermined temperature being higher than or equal to 0°C. judging a moisture preservation mode in which the refrigerating chamber being operated, detecting a temperature of the refrigerating chamber and comparing the detected temperature of the refrigerating chamber with a first predetermined temperature, when the refrigerating chamber being operated in the high moisture preservation mode, operating a compressor and a fan of the refrigerator to cool the refrigerating chamber, when the temperature of the refrigerating chamber being higher than or equal to the first predetermined temperature, stopping the compressor, continuously operating the fan and defrosting an evaporator of the refrigerator, so as to humidify the refrigerating chamber via the fan by using a defrostation water of the evaporator, when the temperature of the refrigerating chamber being lower than or equal to a second predetermined temperature, detecting a temperature of the evaporator, stopping the fan and defrostation of the evaporator so as to stop humidifying the refrigerating chamber with the defrostation water, when the detected temperature of the evaporator being higher than or equal to a third predetermined temperature; detecting the temperature of the refrigerating chamber and comparing the detected temperature of the refrigerating chamber with the first predetermined temperature, when the refrigerating chamber being operated in the normal moisture preservation mode, operating the compressor and the fan of the refrigerator to cool the refrigerating chamber, when the temperature of the refrigerating chamber being higher than or equal to the first predetermined temperature, stopping the compressor and the fan when the temperature of the refrigerating chamber being lower than or equal to the second predetermined temperature, wherein the first predetermined temperature is higher than the second predetermined temperature, and the third predetermined temperature being higher than or equal to 0°C.