China has committed to the world to reduce the intensity of energy consumption and carbon emission by 40% - 50% in 2020, compared with its carbon emission per GDP of 2005. As the capital city, Beijing would set the model for the rest of the country. Based on the industrial structure of Beijing, we measured its carbon emission from 1995 to 2012 according to the energy resources, IPCC (Intergovernmental Panel on Climate Change) coefficients and the real output value of Beijing. The Expandable Stochastic Model of Environment Effect Appraisal testifies the significant coefficient between carbon emission and industrial structure. It also measures the contribution of changes on the overall industrial structure. Then we divide the industry into seven sections, i. e., the first industry, industry, construction, power and heating industry, transportation storage and postage, wholesale and retail trade, hotels and catering services, and life department. The coefficients are significant between the sub sectors and carbon emission, and the contribution of each sub sector is calculated respectively. Then the carbon emission level of each sector is measured through the Logarithmic Weight Balance Analysis and the Expandable Stochastic Model. The influence of industrial structure adjustments is studied on the reduction of carbon emission. Suggestions are put forward on the internal upgrade of industries and the coordinated development between them. For the tertiary industry, the efficiency of energy consumption should be improved.