Shanghai Fengxian University City was adopted as an example to analyze the change of CO2 flux,carbon intensity,and flux source area in year 2011 and 2016 based on geographic information system(GIS),eddy correlation(EC) system,and flux source area model.The conclusions were as follow:1) The daily mean values of CO2 flux and carbon dioxide concentration were 0.6 μmol·m-2·s-1 and 388 mg·L-1 in 2011 and increased to 0.9 μmol·m-2·s-1 and 406 mg·L-1 in 2016; 2) the range of flux source area increased with the increase of atmospheric stability in the research area in both 2011 and 2016; 3) when the atmosphere is in a state of stability,the range of the flux source area under other wind directions is bigger than that under prevailing wind direction.When the atmosphere is in an unstable state,the differences in the length of the flux source area between the prevailing wind direction and the other wind directions are relatively small.