Abstract: As a low-carbon and clean secondary energy source, renewable hydrogen plays an important role in achieving energy transformation of carbon peaking and carbon neutrality. Based on the summary of recent development of renewable hydrogen policies both in China and Europe, the hydrogen strategy and technological positioning of Chinese and European large energy companies are analyzed and compared, and the R&D focus areas within European Commission in the field of power-hydrogen coupling systems are discussed to secure sustainable deployment of large-scale power-hydrogen coupling systems, as well as to establish efficient and diversified utilization ecosystem for renewable hydrogen in China.