Roaming　technology　is　a　very　important　component　in　the　virtual　reality,　so　that　people　at　home　can　appreciate　the　scenic　spots　and　historical　sites　from　all　parts　of　the　virtual　world.　In　this　paper,　a　3-dimensional　model　of　virtual　Badmionton　Venue　for　Olympic　Games　with　different　complexity　was　achieved　on　the　basis　of　the　developing　platform,　which　adapted　the　software　of　Creator　and　Vega　Prime,　combined　Visual　C++　and　OpenGL　language,　improved　mesh　simplified　algorithms.　According　to　the　lacking　interface　of　Vega　Prime,　the　friendly　user＇s　interface　and　roaming　system　was　constructed,　it　helped　people　find　out　the　distribution　situation　of　the　seat　in　venues　before　entering　Olympic　Games　badminton　hall,　and　helped　the　administrator　organize　the　order　of　venues.　The　experiment　proves　that　this　system　has　very　good　interaction　and　real-time　operation.