This paper takes carbon audit, carbon emission reduction, ecological civilization as criterion level indicator to establish carbon audit evaluation system, and then gets the relative weight of each index layer based on expert advice,conducts research in related companies and measurement of carbon emissions index of these campanies.The results show that most companies attach importance to carbon emissions index value, and take measures to limit carbon emissions to meet regulatory requirements. However, fewer enterprises value the index of ecological civilization construction, they are especially lack of participation in the carbon market transactions and production of green output. In addition, although the biological carbon sequestration is still a major reduction strategies adopted by companies, some companies have tried to use the way of geological carbon sequestration to reduce emission.