According　to　the　complexity　and　importance　of　transmission＇s　online　pre-delivery　inspection,　this　article　introduces　the　development　of　transmission＇s　test　monitor　system　based　on　VC++.　Signal　acquisition　module,　signal　analysis　module,　the　quality　detection　module　and　database　module　have　been　contained　in　the　system.　The　system　will　combine　order　analysis　theory　with　spectrum　theory　to　extract　characteristic　signals,　and　provide　two　detection　methods:　support　vector　machine　(SVM)　and　standard　extremal.　The　system　enriches　the　SVM　training　samples　by　the　extremal　to　get　a　more　complete　model　of　support　vector　machine,　so　that　can　improve　the　accuracy　and　detection　efficiency　of　transmission＇s　online　pre-delivery　inspection.　This　paper　describes　the　functionality　of　each　module　and　the　implementation　process,　the　final　experimental　study　shows　the　feasibility　of　the　system.