This　article　uses　LMDI　method　to　calculate　the　change　of　energy　consumption　of　Beijing＇s　and　China＇s　automobile　industry　during　the　year　2002-2009　from　four　aspects:　the　total　effect,　the　production　effect,　the　structural　effect　and　the　intensity　effect.　The　results　show　that　either　for　Beijing＇s　or　for　national　automobile　industry,the　production　effect　and　the　structural　effect　all　improve　the　consumption　of　energy,　but　the　intensity　effect　plays　a　prohibitive　role　in　the　increase　of　energy　consumption;　when　compared　with　the　energy　consumption　of　national　automobile　industry,　the　increasing　trend　of　Beijing＇s　automobile　industry　energy　consumption＇s　total　effect　is　much　more　obvious,　the　production　effect　and　the　structural　effect　are　greater　than　that　of　national　automobile　industry,　and　the　intensity　effect　of　consumption　should　play　a　smaller　role　than　that　of　the　national　automobile　industry　in　reducing　the　energy　consumption.