A system and a method can remotely control an avatar image using a mobile phone. A calling party can remotely control an avatar image included in data transmitted to a called party using a mobile phone. Preferred embodiments of systems and methods according to the present invention can include joint-key button controllers that make buttons corresponding to joints of an avatar image remotely control movements of the joints, respectively. Accordingly, an avatar image received by a called party can be respectively controlled. Since the calling party can remotely control the avatar image transmitted to the called party, it is possible to deliver emotions and messages of the calling party through movements of a visual avatar image.