A　design　based　on　XMPP　and　FCAPS　model　was　provided　to　meet　the　rapidly　growing　and　changing　mobile　IM　needs.　The　protocol　extensions　based　on　the　standard　XMPP　had　been　used　to　support　multimedia　information　sharing.　The　design　added　network　and　systems　management　to　manage　mobile　IM　services.　An　experimental　system　was　developed　to　verify　the　design.　It　was　demonstrated　by　experiment　that　the　system　could　build　stable　and　efficient　mobile　IM　services　with　important　management　and　essential　search　functions.　The　system　processes　a　message　rapidly　and　the　error　rate　is　very　low.