This report is one of the GEI research series. Based on the requirements of sustainable development in Europe, it systematically studies the European Energy Interconnection. It is divided into 7 chapters. In Chapter 1, the development status of the economy, society, resources, environment, energy and power in Europe is introduced. In Chapter 2, the challenges for sustainable development and energy transition in Europe are analyzed and the development ideas for European Energy Interconnection are suggested. In Chapter 3, guided by achieving the 2°C global temperature control target, the development trend for energy and power transition in Europe is envisioned, with corresponding scenarios proposed. In Chapter 4, the distribution of clean energy resources and layout of major power generation bases are studied. In Chapter 5, based on the analysis of the power balance, the overall layout and interconnection scheme for European Energy Interconnection are proposed. In Chapter 6, the comprehensive benefits brought by building European Energy Interconnection are assessed. In Chapter 7, the clean energy and power development path with its scenario in Europe to achieve a targeted 1.5°C temperature control is envisioned.