The whole adopts the bionic form of a horizontal streamlined small whale, the front end is the temperature measurement sensing area, the tail is shaped with a flexible and rising tail, the lines are smooth and round, and the elegant and soft body characteristics of the whale are completely retained. The whole machine is all passivated with rounded corners, free of sharp edges and corners, so as to avoid bumping and scratching. The smooth body conforms to the holding curve of the human body, parents hold the temperature measurement conveniently, and the childlike whale image can also attract children's attention, dispel the serious and cold sense of traditional thermometer, and reduce children's resistance to temperature measurement behavior.