As one of the most dynamic and potential areas of the world's economic development， Southeast Asia is rich in natural resources with a remarkable demographic dividend. In recent years， regional integration has been continuously promoted and its infrastructure has been constantly improved with the upgrading of the industrial structure. However， the region still has more than 30 million people without access to electricity， and electricity consumption per capita is less than half the world average. With the living standard improving and population raising， issues such as energy security， serious environmental pollution， climate crisis， and other serious challenges will occur if the region continuing relies on fossil energy. Therefore， guided by the 2030 Agenda for Sustainable Development， the Paris Agreement， and the ASEAN Plan of Action for Energy Cooperation 2016-2025， the Southeast Asian Energy Interconnection needs to be built based on the clean energy resources， mineral resources， and human resources to achieve sustainable development. It will promote clean development and provide sustainable energy for all， turn regional energy resources into economic benefits， improve people's livelihood， reduce poverty， as well as narrow the development gap in the region. It will also fundamentally solve the problem of energy supply for regional economic development and enable the coordinated development of economy， society and environment.