‘REEI Energy Review 2017’This annual report begins with the analysis of Germany’s energy transition. It reviews the achievements and challenges that Germany has faced in the past several years. Then, we discussed the reasons for the decoupling of carbon emissions from economic growth in the US; although natural gas is a major contributor to coal substitution, the U.S.A. must rely on the development of renewable energy to achieve sustainable decoupling. We also analyze the correlation between the new energy policy of President Donald Trump after taking office and the changes in the employment of coal miners. Finally, we research on two issues in China that require additional attention: How does the carbon pricing system promote the energy transition in transport sector? And whether green power certificate system could play a key role in promoting the development of renewable energy.