The invention discloses a bimetal thermometer capable of measuring temperature difference. According to two groups of thermal bimetal in a shell, each group of thermal bimetal is of a spiral columnar structure; the two groups of thermal bimetal share a center shaft; one ends, far away from each other, of the two groups of thermal bimetal are fixed; one ends, opposite to each other, of the two groups of thermal bimetal have opposite rotation directions; a connecting shaft is fixedly connected between one ends, opposite to each other, of the two groups of thermal bimetal; an angle measurement device for measuring a rotation angle of the connecting shaft is also arranged in the shell. The bimetal thermometer provided by the invention can be used for measuring a temperature difference value in two environments at the same time, and has the advantages of high measurement accuracy and convenience in use.