Based on the status of socio-economic development in Tianjin, uses related measurement model to estimate quantitatively the total carbon emissions and three critical carbon emissions in Tianjin. The calculated result shows: Tianjin total carbon emissions increase continuously from 2000 to 2009, per capita emissions of 2008 is far higher than the national average, and in 2008 Tianjin industrial carbon emissions is 89.866 7 million tons, the traffic carbon emissions is 21.718 5 million tons, building life cycle carbon emissions is 36.630 2 million tons, which totals 148.215 4 million tons and accounts for 98.54% of total carbon emissions. Therefore, the future carbon emission reduction of Tianjin should mainly focus on three areas, i.e. production, transportation and building.