With the outbreak of COVID-19, every temperature measurement seems to be a trial. During the constant simulation of the actual temperature measurement scene. We realized a subconscious psychological action of the tested person that " glancing at the display screen, a feeling of wanting to know current temperature".We designed an interactive way that project the temperature onto the arm to divert tested persons’ attention and alleviate the anxiety. We used a convex lens imaging structure to project the temperature onto the arm. A small projection creates a two-way interaction between the thermometers and the tested person.