To actively address global climate change, China announced that it would aim to achieve peak CO2 emissions before 2030 and carbon neutrality before 2060. These goals bring forward higher requirements for energy transformation and carbon assets management of oil companies in China. Meanwhile, the impact of COVID19 pandemic on the global energy market is becoming prominent, accelerating the asset structure reform in global energy industry. In this context, international oil companies around the world need to transform themselves into low carbon or even net zero carbon energy companies. Aiming to provide suggestions on energy transformation and carbon assets management for oil companies in China, this paper studied targets, future plans and concrete measures implemented in recent years of energy transformation by some international oil companies in Europe and North America. It shows that international oil companies from different regions adopted differential energy transformation strategies based on its own regional economic development. Taking into consideration the reality of Chinas economic development and energy demand, this paper analyzed the current situation and planning objectives of energy transformation in the 3 major oil companies in China, and put forward suggestions for future business development at home and abroad and energy transformation for oil companies in China.