According to the science & technology input, output value, energy consumption, carbon emission of eight industries in Zhuzhou city in 2005—2009, analyzes the relevant relationship between the factors and carbon emission through the degree of grey incidence. The results indicate: with the time change, science & technology input, output value, energy consumption and carbon emissions have a greater convergence trend, but the convergence of different industries is not the same. Based on the analysis, proposes several ways to improve the degree of grey incidence(DGI) for science & technology input of enterprises and carbon emissions.