This paper focuses on the concept of energy security in assessing whether, and how,the priorities related to climate change are gradually changing. After analyzing climate change’s impact on China, conducted via an analysis of the study’s available literature and through the support of international data,this article mainly focuses on the concept of energy security, itself. Under the second section, based on the examination of China’s efforts to transition towards a low-carbon economy, the authors provide a holistic definition of energy security through the lens of three dimensions: energy supply security,energy economy, and energy ecological security. The third section, in turn,addresses the relationship between energy security and climate change. The results presented in the conclusion insist that, in order to strengthen environmental protection in China, it is crucial to reform the highly inefficient and strictly regulated national energy market. In doing so, China’s transition to a low-carbon society and economy could prove less painful, as China’s available resources offer the potential for a strengthened ecological dimension and sustained socio-economic development.