The utility model provides an infrared temperature measuring device. The device comprises an infrared detection probe, a display device, a power supply, a main control circuit, a heat dissipation device and a heat dissipation device control circuit, the main control circuit is used for receiving information detected by the infrared detection probe, converting the information into temperature information and outputting the temperature information to the display, the main control circuit is in communication connection with the infrared detection probe, and the output end of the main control circuit is connected with the input end of the display; the power supply is used for supplying power to the main control circuit and the heat dissipation device control circuit, and the output end of thepower supply is respectively connected with the input ends of the main controller circuit and the heat dissipation device control circuit; and the heat dissipation device control circuit is used for controlling the opening or closing of the heat dissipation device, the input end of the heat dissipation device control circuit is connected with the power supply, and the output end of the heat dissipation device control circuit is connected with the heat dissipation device. According to the utility model, the heat dissipation function can be started at the preset threshold temperature, and the rotating speed of the fan is automatically increased in the process of continuously increasing the temperature so as to achieve the rapid heat dissipation function.