This invention provides a device and method for matching thermal images, which relates to infrared detection. The conventional thermal imaging device is excessively dependent on subjective experience of users to photograph a thermal image of a photographed body during photographing, causing omissions and failing to ensure the quality of the photographed thermal image. In the invention, if there is a specified body thermal image in the photographed infrared thermal image may be detected, and when the specified body thermal image is detected, the identification is displayed, thus to inform the users. Thereby, the technical requirements for the users are reduced, the photographing quality and speed is improved, and the working strength is reduced.