A massager includes a shell component provided with a contact side plate; a semiconductor refrigeration sheet, wherein the semiconductor refrigeration sheet is provided in the shell component, and the first working surface of the semiconductor refrigeration sheet is attached to the contact side plate; at least two electrode plates, wherein all of the electrode plates are provided on the contact side plate, and the polarities of the at least two electrode plates are opposite. The massager and the control method thereof according to the present disclosure use the semiconductor refrigeration sheet to cool or heat, so that the massager can realize various massage functions of cold compress, hot compress and alternating cold and hot massage, and achieve the effect of dissolving fat particles and discharging the fat particles out of the body. Moreover, an electrode plate is provided to release pulses, so that muscles can exercise passively.