A method for controlling a water purifier, the water purifier including: a cooling water tank storing cooling water; a cold water pipe through which edible water flows thereinside, which is received in the cooling water tank, and allowing the edible water to exchange heat with the cooling water such that the edible water is cooled to a temperature lower than room temperature; a refrigerating cycle including an evaporator which is accommodated in the cooling water tank and through which a low-temperature low-pressure two-phase refrigerant for cooling the cooling water flows, and a compressor compressing the low-temperature low-pressure refrigerant introduced from the evaporator into high-temperature high-pressure gaseous refrigerant; and an agitator accommodated in the cooling water tank to forcibly flow the cooling water such that the cooling water in a liquid state exchanges heat with the cooling water in an ice state generated on the surface of the evaporator, the control method comprising: operating a refrigerating cycle when a temperature of the cooling water rises to an upper limit temperature (Tmax) to drive the compressor, wherein, when it is determined that a super-cooled state has occurred while an immediately previous refrigerating cycle is operated, a driving of the agitator is controlled to be delayed; wherein the agitator is controlled to start driving at a time point when the cooling water drops to an intermediate temperature (Tmid); wherein the intermediate temperature (Tmid) is configured to be lower than a freezing temperature of the cooling water in a normal state; wherein when the cooling water reaches a lower limit temperature (Tmin), the compressor and the agitator are configured to be stopped; and wherein the lower limit temperature (Tmin) is configured to be lower than the intermediate temperature (Tmid). a cooling water tank storing cooling water; a cold water pipe through which edible water flows thereinside, which is received in the cooling water tank, and allowing the edible water to exchange heat with the cooling water such that the edible water is cooled to a temperature lower than room temperature; a refrigerating cycle including an evaporator which is accommodated in the cooling water tank and through which a low-temperature low-pressure two-phase refrigerant for cooling the cooling water flows, and a compressor compressing the low-temperature low-pressure refrigerant introduced from the evaporator into high-temperature high-pressure gaseous refrigerant; and an agitator accommodated in the cooling water tank to forcibly flow the cooling water such that the cooling water in a liquid state exchanges heat with the cooling water in an ice state generated on the surface of the evaporator, the control method comprising: operating a refrigerating cycle when a temperature of the cooling water rises to an upper limit temperature (Tmax) to drive the compressor, wherein, when it is determined that a super-cooled state has occurred while an immediately previous refrigerating cycle is operated, a driving of the agitator is controlled to be delayed; wherein the agitator is controlled to start driving at a time point when the cooling water drops to an intermediate temperature (Tmid); wherein the intermediate temperature (Tmid) is configured to be lower than a freezing temperature of the cooling water in a normal state; wherein when the cooling water reaches a lower limit temperature (Tmin), the compressor and the agitator are configured to be stopped; and wherein the lower limit temperature (Tmin) is configured to be lower than the intermediate temperature (Tmid). operating a refrigerating cycle when a temperature of the cooling water rises to an upper limit temperature (Tmax) to drive the compressor, wherein, when it is determined that a super-cooled state has occurred while an immediately previous refrigerating cycle is operated, a driving of the agitator is controlled to be delayed; wherein the agitator is controlled to start driving at a time point when the cooling water drops to an intermediate temperature (Tmid); wherein the intermediate temperature (Tmid) is configured to be lower than a freezing temperature of the cooling water in a normal state; wherein when the cooling water reaches a lower limit temperature (Tmin), the compressor and the agitator are configured to be stopped; and wherein the lower limit temperature (Tmin) is configured to be lower than the intermediate temperature (Tmid).