The　primary　energy　use　in　cities　accounts　for　a　large　share　of　global　energy　consumption,　leading　to　significant　carbon　emissions.　Exploring　the　city＇s　current　characteristics　and　future　trends　in　energy　demand　has　policy　implications　for　carbon　reduction　policy-making.　We　establish　a　city-level　energy　forecast　demand　model　to　predict　Beijing＇s　future　energy　demand.　Results　show　that　economic　growth　has　strong　positive　correlations　with　energy　consumption.　Beijing＇s　energy　demand　is　predicted　to　stay　at　a　pretty　high　level　by　the　end　of　2020,　between　98.72　and　121.60　Mtce,　or　between　4.12　and　5.08　tce　per　capita　under　three　distinctive　GDP　growth　(High,　Medium　and　Low)　scenarios.　Comparing　with　the　start　of　historical　time　series　1980,　this　is　a　huge　increase　of　563.50%　(High),　489.90%　(Medium)　and　423.91%　(Low)　in　terms　of　total　demand,　while　is　increases　of　147.98%,　120.47%　and　95.81%　per　capita.　Based　on　an　energy　structure　model　estimated　by　a　Markov-chain　method,　we　find　that　our　predictions　would　follow　the　current　trend　of　energy　structure,　making　Beijing＇s　coal　demand　decline　towards　zero　share　of　energy　consumption,　natural　gas　rises　approaching　50%,　oil　stays　almost　constant　around　32.3%,　electricity　decreases　below　20%,　and　other　fuels　keep　in　a　small　amount　in　2035.　We　would　expect　to　see　almost　8000　kg　per　capita　carbon　emissions　in　Beijing　if　the　GDP　growth　rate　is　high,　and　still　over　6000　kg　per　capita　if　GDP　growth　is　low.　In　terms　of　total　carbon　emissions,　we　show　that　though　coal　consumption　will　keep　decreasing　towards　zero　in　the　next　years,　total　carbon　emission　still　rises　by　36.5-72.8%　comparing　with　2010.　These　findings　can　provide　references　for　policymakers　to　implement　some　incentive　policies　to　promote　renewable　and　clean　energy.