Abstract: The conflict between Russia and Ukraine has triggered a global energy crisis,with extensive and profound impacts on world energy development.This paper delves into the significant impacts of the Russia-Ukraine conflict on international energy market,energy security,energy settlement system and global economic development,analyzes the future trend of energy price and world energy landscape,and reflects on lesson learned for energy development.According to this study,the Russia-Ukraine conflict has exposed the flaws and vulnerabilities of the current fossil-based energy system,and will lead to accelerated restructuring of global energy landscape.To achieve world sustainable energy development,the key is to facilitate green and low-carbon energy transformation,promote clean replacement in energy production,electricity replacement in energy consumption,and more extensive interconnection of energy systems.Global Energy Interconnection （GEI） provides a technologically advanced,economically cost-effective,viable and systematic solution for promoting world energy transition.It will promote the large-scale development,delivery and use of clean energy,and play a key role in tackling climate change and promoting economic development.