Collaborative　Virtual　Environment　model　and　Role　Scheme　are　two　research　branches　in　computer　science.　Collaborative　activities　need　an　effective　mechanism　to　support　participants＇　roles　and　rights　while　Role　Schemes　can　be　applied　to　this　field.　In　this　paper,　we　present　a　new　generic　role-based　and　agent-oriented　model　for　collaborative　virtual　environment　based　on　discussion　of　collaborative　activity　as　an　essential　role　in　the　research　of　CVE.　It　introduces　Role　Schemes　to　establish　more　efficient　collaborative　virtual　environments.　The　proposed　model　includes　two　important　parts:　Collaborative　entity　and　Collaborative　event.　It　also　advances　Intelligent　Entity　in　Running　State　and　Collaborative　Federation　in　this　model　to　describe　cooperation　in　collaborative　virtual　environment.　©2005　IEEE.