A method for controlling a hot water-refrigerant heat-exchanger circulation system including a heat pump, the hot water-refrigerant heat-exchanger circulation system including a heat pump comprising: an outdoor unit including a compressor, an outdoor heat-exchanger, and an expansion part, and performing a heat pump refrigerant cycle; an indoor unit including a water-refrigerant heat-exchanger which performs heat exchange between a refrigerant discharged from the compressor and water, a water collection tank in which the water passing though the water-refrigerant heat-exchanger is collected, and a water pump which circulates water compulsorily from the water collection tank to the water-refrigerant heat-exchanger; and a hot water circulation unit (4, 5) which receives heat from the heated water discharged from the indoor unit to perform hot water supply or heating, characterized in that the method comprises: detecting a temperature, by an air temperature sensor (111, 121, 131), of a space where the indoor unit is installed, or detecting a water temperature at an inlet or outlet side of the water-refrigerant heat-exchanger by a water temperature sensor (TH 3, TH 4, TH 5); checking whether a driving state of the system is any one of a system stop state, an outing mode, and a heating operation mode, by a control unit; and receiving a command from the control unit, when the temperature detected by the air temperature sensor (111, 121, 131) or the water temperature sensor (TH 3, TH 4, TH 5) is below a set temperature for a freezing burst prevention operation; performing a freezing burst prevention operation, including: performing an operation that the outdoor unit is driven by a heat pump refrigerant cycle, to transfer heat from refrigerant passing through the compressor to the water-refrigerant heat-exchanger; selectively performing operation of an auxiliary heater mounted to the water collection tank; and stopping operation of the water pump such that compulsory water circulation from the water collection tank to the water-refrigerant heat-exchanger stops. an outdoor unit including a compressor, an outdoor heat-exchanger, and an expansion part, and performing a heat pump refrigerant cycle; an indoor unit including a water-refrigerant heat-exchanger which performs heat exchange between a refrigerant discharged from the compressor and water, a water collection tank in which the water passing though the water-refrigerant heat-exchanger is collected, and a water pump which circulates water compulsorily from the water collection tank to the water-refrigerant heat-exchanger; and a hot water circulation unit (4, 5) which receives heat from the heated water discharged from the indoor unit to perform hot water supply or heating, characterized in that the method comprises: detecting a temperature, by an air temperature sensor (111, 121, 131), of a space where the indoor unit is installed, or detecting a water temperature at an inlet or outlet side of the water-refrigerant heat-exchanger by a water temperature sensor (TH 3, TH 4, TH 5); checking whether a driving state of the system is any one of a system stop state, an outing mode, and a heating operation mode, by a control unit; and receiving a command from the control unit, when the temperature detected by the air temperature sensor (111, 121, 131) or the water temperature sensor (TH 3, TH 4, TH 5) is below a set temperature for a freezing burst prevention operation; detecting a temperature, by an air temperature sensor (111, 121, 131), of a space where the indoor unit is installed, or detecting a water temperature at an inlet or outlet side of the water-refrigerant heat-exchanger by a water temperature sensor (TH 3, TH 4, TH 5); checking whether a driving state of the system is any one of a system stop state, an outing mode, and a heating operation mode, by a control unit; and receiving a command from the control unit, when the temperature detected by the air temperature sensor (111, 121, 131) or the water temperature sensor (TH 3, TH 4, TH 5) is below a set temperature for a freezing burst prevention operation; performing a freezing burst prevention operation, including: performing an operation that the outdoor unit is driven by a heat pump refrigerant cycle, to transfer heat from refrigerant passing through the compressor to the water-refrigerant heat-exchanger; selectively performing operation of an auxiliary heater mounted to the water collection tank; and stopping operation of the water pump such that compulsory water circulation from the water collection tank to the water-refrigerant heat-exchanger stops. performing an operation that the outdoor unit is driven by a heat pump refrigerant cycle, to transfer heat from refrigerant passing through the compressor to the water-refrigerant heat-exchanger; selectively performing operation of an auxiliary heater mounted to the water collection tank; and stopping operation of the water pump such that compulsory water circulation from the water collection tank to the water-refrigerant heat-exchanger stops.