This book integrates the theory and practice of carbon trading at home and abroad, focusing on major theoretical and practical issues of establishing an emissions trading scheme (ETS) in China during its transition to a low-carbon economy. First, a theoretical analysis of the relationship between the transformation of the low-carbon economy and ETS is presented. Second, policy design, institutional evolution, market operation and practical effects of the major global ETSs are systematically compared. Third, the theoretical basis, key points, modelling methods, computational simulation, policy options and operational steps for key institutional and designing of policy elements in China's ETS are analyzed individually. Finally, policy recommendations for the top-level design of China's ETS are proposed.