A heat pump-type hot water feeding apparatus comprising: a cooling cycle circuit configured so that coolant flows through a compressor, an indoor heat exchanger, an expander (16, 17), and an outdoor heat exchanger; a heat storage tank that stores heat exchanged with coolant branched from the cooling cycle circuit; a floor heating unit; and a hydro kit heat exchanging unit that includes a first heat exchanger that performs heat exchange between a first heat transfer fluid and coolant compressed in a supersaturated region by the compressor and primarily condenses the coolant and a second heat exchanger that performs heat exchange between the primarily condensed coolant and a second heat transfer fluid and secondarily condenses the coolant, wherein the hydro kit heat exchanging unit is connected to the cooling cycle circuit, wherein during a heat storage mode operation that stores heat in the heat storage tank, heat of the first heat transfer fluid, which is heat exchanged in the first heat exchanger, is stored in the heat storage tank or heat of the first heat transfer fluid, which is heat exchanged in the first heat exchanger and heat of the second heat transfer fluid, which is heat exchanged in the second heat exchanger, are simultaneously stored in the heat storage tank, wherein the heat of the second heat transfer fluid is not only stored in the heat storage tank but also used for floor heating water of said floor heating unit according to a user's selection, wherein the second heat exchanger performs heat exchange between the floor heating water and the coolant for floor heating during a floor heating mode operation and stores in the heat storage tank heat of the floor heating water, which is exchanged during a mode operation including the heat storage mode operation, and wherein the mode operation includes a room cooling mode operation for room cooling, a room heating mode operation for room heating, and a hot water feeding mode operation for providing the heat storage water contained in the heat storage tank, wherein the heat storage mode operation alone is performed, or the heat storage mode operation and the mode operation are simultaneously performed; the heat pump-type hot water feeding apparatus further comprising a coolant adjuster that is provided in the cooling cycle circuit, the heat pump-type hot water feeding apparatus being characterized in that it further comprises a heat exchanger bypass path that guides coolant passing through the first and second heat exchangers (74, 72) to between the outdoor heat exchanger and the indoor heat exchanger so that the coolant bypasses one of the outdoor heat exchanger and the indoor heat exchanger; wherein the coolant adjuster enables the coolant to selectively flow to at least one of the cooling cycle circuit or the hydro kit heat exchanging unit, wherein coolant selectively flows through the heat exchanger bypass path by an auxiliary coolant adjuster that is provided between the heat exchanger bypass path and the hydro kit heat exchanging unit. a cooling cycle circuit configured so that coolant flows through a compressor, an indoor heat exchanger, an expander (16, 17), and an outdoor heat exchanger; a heat storage tank that stores heat exchanged with coolant branched from the cooling cycle circuit;