The invention relates to a double-temperature-state unit heat exchange station, which comprises a machine frame, a first water mixing tank, a second water mixing tank and a plate type heat exchanger, wherein the plate type heat exchanger is provided with a primary water inlet, a primary water outlet, a secondary water inlet and a secondary water outlet, the first water mixing tank is provided with a cold and heat source water inlet, an air exchange machine water outlet, a heat exchanger water outlet and a first bypass opening, the second water mixing tank is provided with an air exchange machine water return opening, a heat exchanger water return opening, a cold and heat source water outlet and a second bypass opening, the heat exchanger water outlet is communicated with the primary water inlet of the plate type heat exchanger, the primary water outlet of the plate type heat exchanger is communicated with the heat exchanger water return opening through a pipeline, and the first bypass opening and the second bypass opening are mutually connected through a pipeline provided with a pressure difference bypass valve. The double-temperature-state unit heat exchange station has the advantages that the machine room part of a central air-conditioning system is fully integrated, two kinds of temperature required by refrigeration dehumidification fresh air and high-temperature radiation can be simultaneously met, the installation work period of the central air-conditioning system is shortened, and the problem of excessive dependence on blue-collar workers of construction teams is effectively solved.