A cement which is used in construction and a concrete which is a hydration product of cement is considered anti-environmental materials because of lots of CO2 emission in progress of producing and making them. But a concrete absorbs CO2 gas in atmosphere after hydration and in its lifetime. It is called carbonation. Based on Papadakis’ theses, this research is carried on calculation of the CO2 absorption quantity in concrete. After research, we calculated the CO2 absorption quantity in concrete which has various surface-finishes and we evaluate each surface-finishes the resistance against carbonation.