In　order　to　better　use　and　store　scene　data　in　virtual　reality,　the　modeling　mechanism　is　proposed　by　applying　relation　database.　Compared　with　others,　it　is　more　regular　to　express　scene　data,　with　better　reusability　and　maintainability　of　3D　data,　large　application　expansion　to　3D　data,　more　reasonable　mutual　data　storage　between　2-dimensional　control　cabinet　and　the　virtual　scene.　It　also　provides　an　approach　to　optimization　and　format　conversion　of　3D　scene　data.