The purpose of this study is to analyze the long-term (until 2100) dynamic impacts of ICT on environment and economy. Moreover, how the economic discrepancy changes with time will be clarified by observing the changes in per capita GDP and the tax rates among countries. Since it is required to abate GHG emissions internationally by seeing the long-term future, it is expected that this study contributes to the provision of a clear vision for the consideration of future international climate change policies. This is because it is possible to incorporate the potential future outlook regarding factors such as the economic, social, and technological growth of countries. As in the previous studies, ICT is compared with CCT, which is the most efficient carbon tax system in theory.