Feasibility　research　is　an　interdisciplinary　systematic　science　with　the　characteristics　of　policy-dependent　and　high-speciality.　It　may　have　great　influence　on　the　national　economy,　and　massive　impact　on　the　society,　economy,　politics　and　culture.　Since　the　transformation　of　investment　subjects　in　China＇s　economy　and　its　entrance　into　WTO,　great　needs　and　importance　have　been　granted　to　the　social　and　environmental　evaluation　of　feasibility　research.　Yet　the　traditional　economic　methods　are　incapable　in　meeting　these　needs.　With　system　theory　as　the　keystone,　this　paper　depicts　the　systematic　properties　of　feasibility　researches　and　the　unique　characteristics　of　relevant　social　and　environmental　evaluation.　A　stability　analyze　approach　is　presented,　on　top　of　which　an　attempt　on　social　and　environmental　evaluation　approaches　based　on　complex　network　dynamics　has　been　made.