The utility model discloses a semiconductor refrigeration controller, including confined water tank, water tank installs the top radiator fan, and the circulating pump is installed to the bottom in the water tank, and this circulating pump passes through circulation fluid pump sending pipe and radiator fan UNICOM, radiator fan's bottom be provided with respectively with the circulation fluid of semiconductor cooler's access connection go out the flow tube, with the circulation fluid back flow of semiconductor cooler's exit linkage, radiator fan's bottom still is equipped with the pipe that falls into with water tank UNICOM, filling circulation fluid in the water tank, water tank is provided with the flow direction of operating time, work load and the circulation fluid of automatic controlsemiconductor refrigerator and radiator fan, circulating pump outward. The utility model discloses a semiconductor refrigeration controller's work, the flow direction of operating time, work load andthe circulation fluid of semiconductor refrigerator and radiator fan, circulating pump, the heat that produces semiconductor cooler scatters and disappears in the atmosphere to ensure that semiconductor cooler works and the safety work as required.