The ear thermometer is mainly composed of a shell, a temperature sensor, a temperature sensor, a PCB circuit, a liquid crystal display, a beeper and a battery. Through the ear measurement method, the infrared sensor is aimed at the ears to measure human body temperature. The ear thermometer has novel appearance design and reasonable functional structure design. It adopts mercury-free 3D probe technology to identify the bending of the ear canal and the direction of entering the ear, which is convenient for users to measure and use. The new design of the soft probe has a small caliber and earmuff protection. It is very soft and beneficial to protect the ears. The earmuff can also be replaced to effectively avoid cross infection. There is a screen with liquid crystal display and a three-color backlight with LED lamp temperature display. The data read during the day or at night is very clear and accurate. The appearance design conforms to ergonomics, streamlined design, simple and soft body. The colors are grayish white and light blue, and the surface process is exquisite and the texture is friendly. The hand-held position is curved and the inner side is concave, which improves the hand-held degree and has better comfort. The man-machine interface design is simple and reasonable, the operation is simple and convenient, and the keys are clear. The ear thermometer also has an automatic switch design. The ear thermometer is designed with intelligent voice broadcasting function, which can easily read the degree when measuring data. The early warning temperature can be set in advance. When the measured temperature exceeds the early warning temperature, the intelligent voice will issue a warning, which is very simple and convenient to use.