The　renovation　of　old　buildings　provides　an　important　approach　to　energy　saving　and　emission　reduction　with　low　economic　costs.　The　current　important　issue　remains　how　to　determine　the　optimal　cost-effective　technical　path　for　a　specific　project,　although　there　are　a　large　number　of　retrofit　technologies　to　choose　from.　Based　on　a　systematic　perspective,　this　paper　conducts　a　quantitative　analysis　of　the　environmental　and　economic　benefits　of　building　renovation,　and　compares　and　studies　the　role　and　challenges　of　different　countries　in　the　process　of　recycling　waste　building　materials　and　technological　innovation　to　extend　the　life　of　buildings.　Through　the　use　of　VOSviewer,　1402　papers　from　the　Web　of　Science　core　collection　database　were　visualized,　analyzed,　and　deduced,　and　the　research　context　and　development　trends　of　architectural　renovation　were　sorted　out　and　presented.　Finally,　this　article　discusses　the　status　and　application　process　of　existing　building　renovation　technologies,　including　the　current　obstacles　that　need　to　be　resolved.　It　puts　forward　a　vision　for　the　future　development　of　building　renovation,　emphasizing　that　top-down　guidance　is　essential　to　future　carbon　neutral　goals.　©　2023　by　the　authors.