The purpose of this research studies the impact of carbon dioxide emission of Thailand in the every sectors and the relationship of the carbon dioxide emission in the every sectors of Thailand in 2005. By data analysis, this research used Input-Output table (IO table) of Thailand in 2005 and tool used in the analysis is the "Leontief", where such information is divided into the domestic economic data. The data shows the relationship of each of the other industry resources are to be used in its own industry. In this study based on the burning fuel only 4 energy sectors is Coal and Lignite, Petroleum and Natural gas, Petroleum refineries and Electricity in accordance with the principles of the IPCC. The results showed that the carbon dioxide emission of burning fuel was 187.39 MtCO2 by the industry with the most carbon dioxide emission first 3 1.Total final demand (35%), 2.Transportation and Communication (14%) and 3.Trade and services (13%). More expected result is a relationship of the carbon dioxide emission of Backward Linkage and Forward Linkage. By the study indicates that Thailand should prepare a plan to reduce the carbon dioxide emission by focusing on the particular industry in order to reduce the carbon dioxide emission of the country.