Abstract: A wrist-watch mobile phone device which is recharged by body temperature to prevent from signal interruption includes a wrist-watch mobile phone unit which is applied in a cellular wireless communication system, and a wrist band which is assembled with the wrist-watch mobile phone unit. The mobile phone unit includes a housing which is provided with wrist-band installation members and a cover which is pivoted at the housing and can be flipped open freely. A rear side of the housing that is in contact with a human arm is embedded with thermoelectric power generating chips to recharge a primary battery of the mobile phone at any time by body temperature of the arm. In addition, a surface or a part of the cover is provided with an independent system of a quartz-core watch to facilitate reading time.