An ear temperature detection device, which comprises a first heating element and a second heating element. Under the control of a control unit, the first heating element is configured to heat a front end of an infrared detection module, and the second heating element is configured to heat a rear end of the infrared detection module. By heating both the front and rear ends, the overall temperature of the infrared detection module in the direction of infrared incidence (i.e., the front-to-rear direction of the infrared detection module) is made more uniform, reducing or eliminating the temperature gradient issue within the infrared detection module, thereby improving the measurement accuracy of the infrared detection module.