Multimedia messaging auto replying service method and system

A multimedia messaging automatic response service method and a system thereof are provided to set different kinds of various automatic response messages for one multimedia message sender, or to set different automatic response messages according to each sender, thereby giving higher satisfaction to both users. An MMS(Multimedia Messaging Service) relay/server checks whether a new multimedia message is received or not(401). If so, the relay/server perceives a receiver of the multimedia message(403), and retrieves whether an automatic response set by the perceived receiver exists or not(405). If so, the relay/server retrieves an automatic response message having a retrieval condition which includes priority set in the message and a sender of the message(409), then checks whether an automatic response message is detected or not(411). If so, the relay/server decides whether one automatic response message is detected or not(413). If so, the relay/server selects the most appropriate automatic response message(415), and transmits the selected automatic response message to the sender of the message(417).