Abstract: This paper analyzes the present situation of China’s energy structure and the main challenges faced by energy transformation,combined with future energy demand,and studies a low-carbon and low-cost energy transformation path suitable for China’s national conditions. It proposes a new type energy system solution that focuses on renewable energy as the main body,complements multi energy sources,combines "coolingheating-power",and integrates "source-network-load",which is a renewable energy integrated system. Then,the current status and key technologies of renewable energy integrated systems are studied,and their future development trends are analyzed. The research results show that building a hierarchical and scenario based new type energy system centered around the user side,with renewable energy as the main body,integrates "coolingheating-power" and "source-network-load" around the user side is a systematic solution for China to achieve energy transformation.