Apparatus and method for providing fax service in ip multimedia subsystem

PURPOSE: An apparatus and a method for providing a fax service in an IP multimedia subsystem are provide to enable an IP multimedia subsystem to supply a fax service by using an additional server for a fax service. CONSTITUTION: It is checked whether or not a fax transmission event occurs(401). If the fax transmission event occurs, a fax transmission request message including a number of a fax apparatus is generated(403). The terminal transmits the generated fax transmission request message to a fax server of an IMS network(405). The terminal receives a fax transmission accept message from the fax server(407).