The road map to reduce green house gas in the mid and long term is required to improve international competitiveness and minimize economic loss by government regulations. Many companies in the Gunsan2 National Industrial Complex should enforce the target management system of energy and green house gas and strengthen its standard in the future according to low-carbon green growth acts. In this study, the reduction of green house gas emissions was investigated through the improvement of operation methods, facilities, heat recovery of exhaust,energy conversion, and heating reactor. If this green house gas reduction plan is applied to major companies in the Gunsan2 National Industrial Complex, a total of 68,942 tCO2eq can be reduced in 2015.