This thesis focuses on renewable energy development in China to examine how China has increased renewable energy production and consumption. Government role in renewable development, supporting policies, and the process of energy transition through the increasing importance of renewable energy resources in the world energy market and China are presented. Chinese renewable firms are also assessed in terms of their roles in renewable energy and related sectors. The findings of the study are discussed according to the basic arguments of realism for future research on whether China’s energy transition increases its power and expands its capabilities in global scale.