Based　on　Annular　Crossed　Cable-truss　Structure(ACCTS)　model　with　diameter　of　17.15m,the　type　of　membrane　roof　was　firstly　studied.　Two　schemes　of　membrane　roofs,　cable-supported　membrane　roof　and　skeleton　supported　membrane　roof,　were　proposed.　The　form-finding　analysis　of　two　types　of　membrane　roof　structure　was　carried　out.　By　comparative　study,　the　strengths　and　weaknesses　of　two　schemes　were　given,　and　the　feasibility　of　skeleton　membrane　roof　was　demonstrated.　Secondly,　skeleton　membrane　roof　was　studied　by　collaborative　form-finding　and　non-collaborative　form-finding.　The　form-finding　method　being　suitable　for　the　structure　was　given.　Finally,　load　analysis　of　membrane　and　non-membrane　roof　structure　were　carried　out.　The　results　showed　skeleton　membrane　roof　had　strength　to　resist　to　external　loads.　The　studied　content　has　promoted　the　application　of　annular　crossed　cable-truss　structure　in　practical　engineering.