An aquaculture constant temperature control device includes a control circuit, a heater, a cold water tank, a solenoid valve, and a pump； wherein the water in the aquaculture tank is heated by the heater, and through the pump The pumped water neutralizes the high temperature water and cold water in a plurality of water pipes to form warm water, and pumps it into the aquaculture tank, so that the water in the aquaculture tank can maintain a constant temperature of the water temperature in the cultured fish carp, thereby making fish Can survive the cold current.一種水產養殖恆溫控制裝置，包括：一控制電路、一加熱器、一冷水槽、一電磁閥及一幫浦；其中，透過該加熱器對該養殖槽中水進行加溫，以及透過該幫浦之抽水，使高溫水與冷水於複數個輸水管內中和形成溫水，並抽送入該養殖槽中，使該養殖槽中之水能維持養殖魚塭內之水溫的恆溫，藉以令魚群能順利度過寒流。
