Greenhouse gas (GHG) emissions influences climate change directly. To protect the human survival circumstance, it is imperative to reduce carbon emission, adjust the energy structure, and promote energy transaction. The construction industry is a mainstay industry of the national economy. Construction industry is a typical " low carbon outside, high carbon inside" industry. If only focusing on building construction industry itself, the energy consumption as well as the carbon emission level are not very high, however, the process combines with lots of correlative industries which will cause more carbon emission than it seems to be. Based on domestic and foreign research, the paper talks about the generalized perspective of carbon emission in the whole construction industry chain by analyzing industry's production and consumption parts, as well as based on the input-output model, combining statistics data, the construction carbon emission calculation under the perspective of whole industry chain is carried out. From this process, a macroscopic method of carbon emissions in the construction industry chain is proposed, the proportion of carbon emission in the industry chain is analyzed, the importance of energy conservation and carbon emissions reduction in the industry chain is revealed, and some reform policies from the supply side are mentioned.