Abstract: In the context of energy transition in China, the power system plays a critical role in constructing a clean, low-carbon, safe and efficient modern energy system. However, the current power system in China presents new characteristics of uncertainty, openness, and complexity, which makes it more vulnerable to the increasing natural disasters and possible manmade attacks, adding great potential risks to its operation. Focusing on the development of resilient power system in the context of energy transition, this paper first discussed the necessities of developing a resilient power system, from both internal and external aspects. Then the concept of resilient power system, including its definition, characteristics and research areas, were elaborated in detail. Afterwards, based on literature survey, the paper expounded on the key technologies of resilient power system from the point of view of primary system and cyber security, and the prospects were presented at last for the development of resilient power system in the context of energy transition in China.