A　network　based　desktop　virtual　reality　(VR)　system　is　proposed.　including　the　system　design　architecture　and　its　implementation　methods.　By　using　the　OpenGL　and　VC++,　the　system　is　successfully　developed　for　explosive　disposal　training　and　teaching.　The　assembly　module　makes　the　user　free　from　the　complex　geometric　modeling.　In　addition,　the　security　management　separates　sensitive　data　from　non-EOD　personnel.　And　the　adaptive　strategy　of　sharing　node＇s　state　synchronization　and　congestion　control　for　multi-modes　training　is　also　given.　Compared　with　the　existing　VR　systems,　the　proposed　scheme　offers　an　affordable　virtual　simulation　environment　with　low　cost　for　similar　teaching　and　training　application.