For　studying　new　and　renewable　energy　as　a　substitute　for　fossil　energy　in　primary　energy　consumption　and　its　impact　on　carbon　emissions　to　cope　with　economic　uncertainties,　a　multi-sector　DSGE　model　was　employed　to　simulate　the　dynamic　impact　on　carbon　emissions　and　macroeconomic　development.　The　structural　adjustment　of　energy　consumption　and　the　carbon　emissions　mitigation　policy　were　considered　in　the　model.　The　simulation　results　showed　that　using　new　and　renewable　energy　instead　of　fossil　energy　is　an　optimal　choice　for　the　firms　to　comply　with　the　regulations　of　carbon　emission　mitigation　policy.　Structural　adjustment　of　energy　consumption　is　the　best　route　to　achieve　the　dual　goal　of　economic　development　and　carbon　emission　reduction.　Unexpected　sharp　fall　in　free　carbon　quota　has　a　negative　impact　on　the　economy.