Low-carbon economic development has become a fundamental approach to coordinating economic development and carbon emissions mitigation. As rapid developing economic, aviation and navigation, and financial center of North China, Tianjins energy demand and CO, emissions are mushrooming, with per capita CO, emission from fossil fuel combustion exceeding 20 t in 2020, which much exceeds current level of USA. In the background of global responding to climate change, China will likely he requested to commit peaking its GHG emissions during 2020-2030, which will inevitably reduce the room of development in Tianjin enormously. Tianjin should make deployment ahead, realizing win-win of addressing climate change and sustainable development, with low-carbon economic development as important strategic mission, First of all, Tianjin should devote more efforts to reducing energy intensity and realizing relative emission reduction. Scenario analysis shows that Tianjins future CO2 emissions Will continue to increase rapidly, but they can be significantly reduced by taking measures. Second, Tianjin should get ready for achieving absolute reduction of CO2 emissions as soon as possible, preparing system, technology and talent in advance, making great efforts to establish institutional mechanisms conducive to low-carbon development ,from now on, starting from energy conservation and emission reduction, actively carrying out low-carbon technology research and development, vigorously developing the tertiary industry with low emissions, developing new and renewable energy resources, actively promote low-carbon consumption.