As　the　main　representative　of　new　energy,　photovoltaic　energy　is　widely　used　in　civil　engineering　construction,　its　purpose　is　to　reduce　the　energy　consumption　in　the　project,　there　is　a　deviation　in　the　integration　of　new　energy　and　civil　engineering,　and　it　cannot　effectively　play　its　own　advantages.　Continuously　analyze　the　changes　in　the　energy　consumption　values　of　civil　engineering.　Then,　the　influencing　factors　of　building　energy　consumption　were　introduced,　and　the　covariance　matrix　was　constructed,　and　the　engineering　construction　benefit　was　taken　as　the　ultimate　goal.　When　calculating　energy　consumption,　the　dual　benefits　of　building　benefits　are　fully　considered,　and　environmental　protection　and　engineering　energy　consumption　are　estimated　to　reduce　the　error　of　energy　consumption　calculation.　The　results　show　that　new　energy　can　reduce　the　high　energy　consumption　value　in　the　project,　improve　the　light　transmittance,　enhance　the　conversion　rate　of　sunlight,　and　provide　support　for　the　transportation,　lighting　and　thermal　insulation　of　the　building,　with　an　increase　rate　of　10~25%,　and　the　new　energy　can　reduce　the　cost　of　civil　engineering,　with　a　reduction　rate　of　19~26%,　and　improve　the　economic　and　social　benefits,　with　an　increase　of　more　than　10%.　Therefore,　new　energy　can　reduce　the　energy　and　energy　consumption　of　civil　engineering,　and　expand　the　scope　and　application　depth　of　new　energy　development.　©　2024,　European　Association　for　the　Development　of　Renewable　Energy,　Environment　and　Power　Quality　(EA4EPQ).　All　rights　reserved.