Along　with　the　development　of　human　society　and　high　demand　on　environmental　quality,　the　assessment　of　landscape　impact　has　played　an　important　role　on　the　regional　planning　construction　or　exploitation　project.　However,　there　are　still　many　problems　in　landscape　impact　assessment　process,　because　it　is　difficult　to　determine　the　standards　and　rating　scale,　besides　the　evaluation　method　on　landscape　impact　assessment　was　not　scientific　enough.　The　paper　used　the　3S　technology　in　the　landscape　impact　assessment　process.　Firstly,　According　to　remote　sensing　data　to　reseach　the　regional　landuse　or　landcover　change　features　before　and　after　completion　of　the　project,　and　then　calculated　the　main　landscape　indices　to　explore　the　landscape　pattern　changes,　environmental　effects,　carrying　capacity　of　resources　and　landscape　visual　coordination.　Finally,　we　can　get　an　effective　method　of　landscape　impact　assessment　to　apply　in　the　regional　planning　construction　or　exploitation　project.　©　2011　IEEE.