On　the　basis　of　an　overivew　of　knowledge-sharing　system　of　enterprises,　this　paper　analyzes　the　relationship　among　the　knowledge-sharing　subject,　object,　technology　and　management,　puts　forward　the　potential　function　of　knowledge-sharing　system　of　enterprises,　and　explores　the　evolution　mechanism　of　knowledge-sharing　system　of　enterprises　based　on　the　potential　function,　so　as　to　arrive　at　the　relevant　conclusions　of　the　evolution　of　knowledge-sharing　system　of　enterprises.　©　2010　IEEE.