Abstract: As an important industry supporting economic development and affecting the ecological environment, the high-quality development of the energy industry is crucial to the high-quality development of China's economy. Since the concept of high-quality energy development was put forward, relevant researches have not been commonly conducted until now. It is urgent to research the connotation and paths of high-quality energy development. A model system is firstly constructed for the analysis of medium- and long-term energy outlook in China, highlighting the characteristics of the power system and its impacts on energy transition. Secondly, two scenarios are set for China’s medium- and long-term energy development. Thirdly, the connotation of China's energy high-quality development is analyzed and the main indicators are proposed. Finally, under the two scenarios, China's medium- and long-term energy development path is forecasted, and comparative analysis is carried out based on the main evaluation indicators of energy high-quality development.

Key words: high quality energy development, energy transition, energy and electricity development outlook, electrification