The　number　of　Beijing＇s　civil　vehicles　is　growing　rapidly　due　to　the　great　support　of　the　automobile　industry　and　the　Chinese　government　and　the　increasing　average　per　capita　income　of　China＇s　people.　Exhaust　emissions　from　vehicles　have　already　become　the　main　source　of　Beijing＇s　air　pollution.　Based　on　the　Long-range　Energy　Alternatives　Planning　System　(LEAP),　this　article　predicts　the　energy　consumption　and　exhaust　emissions　from　Beijing＇s　civil　vehicles.　Also,　we　estimated　the　reduction　potentials　of　China＇s　new　fuel　consumption　standards　and　exhaust　pollutants　standards　that　will　be　implemented　from　2008　to　2020.　Two　scenarios　were　developed:　＂Business　as　Usual＂　(BAU)　and　＂New　Standard＂　(NS).　In　the　BAU　scenario,　the　Chinese　government　would　do　nothing　to　improve　the　fuel　consumption　standards　and　exhaust　pollutants　standards　in　the　future.　In　the　NS　scenario,　the　Chinese　government　would　implement　more　strict　fuel　consumption　standards　and　exhaust　pollutants　standards　for　Beijing＇s　civil　vehicles.　By　comparing　the　results　of　the　two　scenarios　for　year　2020,　the　energy　consumption　will　experience　a　reduction　of　7.8%,　and　the　exhaust　pollutants　CO,　HC,　NOX,　PM,　and　the　emissions　of　CO2　would　decrease　by　43.3%,　36.4%,　60.3%,　81.2%,　and　7.8%,　respectively.