the　rapid　development　of　P2P　IPTV　has　brought　great　challenges　to　Internet　Content　Security,　like　the　prevalence　of　illegal　information,　problems　of　piracy　and　etc.　More　and　more　difficulties　are　posed　to　the　work　of　supervision　and　management　not　only　because　of　most　of　P2P　IPTV　applications　are　closed　source　but　also　the　features　of　decentralization　and　anonymity　of　the　P2P　network.　This　paper　declared　a　feasible　solution　to　analysis　and　identifies　the　signatures　of　key　packets　through　network　measurement　and　matching　algorithm,　and　the　peer　discovery,　which　is　the　main　work　of　the　supervision,　will　be　finished　by　the　data　analysis　of　packets.　The　experimental　data　of　measuring　some　typical　P2P　IPTV　applications　approved　practicability　of　the　solution.