OSGi　R4　specification　provides　event　announcement　/　notification　model　based　on　topic.　But　the　model　cannot　guarantee　the　release　of　news　publishers　subscribers　listen　at　the　same　pace,　so　the　messages　will　be　lost　to　subscribers　who　isn＇t　listening.　To　solve　the　problem　mentioned　above,　this　paper　put　forward　an　OSGi　message　service　model　based　on　peer-to-peer　mechanism,　which　lifts　time　correlation　between　the　sender　and　receiver　through　the　message　queue　mechanism.　Finally,　the　model　is　verified　to　be　valid　and　reliable　by　experiment.　©　2011　IEEE.