An apparatus and method are provided for managing XDM service information in an XDM client included in a user terminal of an OMA system. The apparatus includes a controller for creating a shared URI list including a static reference handle value for indicating the shared URI list, transmitting the shared URI list to a shared XDMS for storage as a reference for service information corresponding to a plurality of OMA services in accordance with the static reference handle value, and changing the at least one piece of the service information; a receiving device for receiving the request to create the shared URI list; and a transmitting device for transmitting the shared URI list to the shared XDMS. The service information includes at least one of RLS service information, PoC service information, and XDM service information.