The　current　global　environmental　problems　have　become　increasingly　serious,　vigorously　develop　the　strategy　of　sustainable　development　has　become　an　important　issue　facing　the　world,　promote　the　development　of　green　building　is　the　important　part　of　sustainable　development.　China＇s　energy　shortage　of　building　energy　consumption　serious　case,　the　implementation　of　energy-efficient　green　building　is　an　inevitable　requirement　for　China＇s　sustainable　economic　development.　This　paper　analyzes　the　concept　of　green　building　and　features,　based　on　life　cycle　cost　of　green　building　theory　and　engineering　economics　theory,　a　brief　study　of　the　costs　and　benefits　of　green　building,　build　the　environmental　benefits　of　green　building　evaluation　model,　provide　a　theoretical　basis　for　the　evaluation　of　green　building　environmental　benefits.　As　technology　advances,　the　socio-economic　development,　people　are　enjoying　tremendous　cultural　prosperity　and　material　conditions　meet,　while　the　world　is　suffering　from　a　shortage　of　natural　resources　and　environmental　pollution,　global　climate　warming.　The　grim　situation　to　improve　the　quality　of　life　at　the　same　time,　we　must　pay　attention　to　resource　conservation　and　environmental　protection　to　achieve　sustainable　development　of　human　society.　Construction　industry　have　a　great　impact　on　the　resources　and　environment,　but　the　development　of　China＇s　construction　industry　is　the　extensive　development　at　the　expense　of　high　input,　high　consumption,　high　emission　low　efficiency　and　difficult　cycle.　China＇s　building　energy　consumption　caused　by　pollution　is　very　serious,　it　brings　huge　energy　consumption,　heavy　pollution　and　the　large　amount　of　carbon　dioxide,　sulfur　trioxide　from　dust　emissions,　construction　has　reached　25%　of　the　contribution　rate　of　greenhouse　gas　emissions,　coal-fired　heating　caused　air　pollution　has　reached　the　World　Health　Organization　to　the　highest　standards　of　2　to　5　times.　Therefore,　the　development　of　more　environmentally　and　friendly　energy　sustainable　building　has　become　an　inevitable　choice　for　the　development　of　China＇s　construction　industry.　Green　Building,　also　known　as　eco-building,　sustainable　building,　is　to　provide　people　with　healthy,　comfortable　and　safe　place　to　live,　work　and　activities　of　space　in　the　building　life　cycle　to　maximize　conservation　of　resources　(energy　saving,　section　land,　water,　and　materials),　to　protect　the　environment　and　reduce　pollution,　provide　people　with　healthy,　appropriate　and　efficient　use　of　space,　the　building　in　harmony　with　nature.