The process of economic development is conducted by many countries in order to increase the wealth of the people. In the implementation, there are affecting factors both internal and external. The objective of the research was to learn the effect of CO2 Emission, Energy Usage, and Foreign Direct Investment (FDI) toward the economy in ASEAN countries 2005 – 2015. The research used panel data method that combined time series and cross section data using Eviews 7 program. Based on the analysis conducted, the research result indicates that Energy Usage has significant and positive effect toward per capita GDP. CO2 Emission has significant and positive effect toward per capita GDP. The research also indicates that during 2005 – 2015 ASEAN countries were indicated to experience Environmental Kuznets Curve (EKC).