This　study　explores　the　driving　forces　of　the　changes　of　national　and　regional　CO2　emissions　using　temporal　decomposition　analysis　model,　and　investigates　the　driving　forces　of　the　differences　of　CO2　emissions　between　China＇s　30　regions　and　the　national　average　using　spatial　decomposition　analysis　model.　The　changes　or　the　differences　in　national　and　regional　CO2　emissions　during　2000-2014　are　decomposed　into　nine　underlying　determinants.　Temporal　decomposition　results　show　that　economic　scale　effect　is　the　dominant　driving　force　leading　to　the　increases　in　both　national　and　regional　CO2.　emissions,　while　energy　intensity　effect　is　the　main　contributor　to　the　reduction　of　CO2　emissions.　Contribution　of　various　variables　to　CO2　emissions　between　eastern　region　and　central　region　are　roughly　same.　Spatial　decomposition　results　demonstrate　that　the　differences　of　CO2　emissions　among　China＇s　30　regions　are　expanding　increasingly.　Economic　scale　effect　is　main　driving　force　responsible　for　the　difference　in　CO2　emissions　among　regions,　and　energy　intensity　effect,　energy　structure　effect　and　industrial　structure　effect　are　also　important　factors　which　result　in　the　increasing　differences　in　regional　CO2　emissions.　In　addition,　resource-based　and　less　developed　regions　have　greater　potential　in　the　reduction　of　CO2　emissions.　Understanding　CO2　emissions　and　the　driving　forces　of　various　regions　is　critical　for　developing　regional　mitigation　strategies　in　China.　(C)　2017　Elsevier　B.V.　All　rights　reserved.