Abstract 1 Introduction 2 National Demands and Significance of Space Science, Applications and Technology in 2050 2.1 Major problems confronting the development of China in 2050 2.2 Strategic impact of space science, applications and technology on the development of China 3 Trends of Space Science, Applications and Technology and Development Strategies for Space Powers 3.1 Development strategies for space powers and features of global space activities 3.2 Trends of global space science, applications and technology 4 Research Status, Advantages and Disadvantages of China in Space Science, Applications and Technology 5 Development Strategy and Roadmap for Space Science, Applications and Technology to 2050 5.1 Guiding principles 5.2 Vision 5.3 Strategic goals and roadmap to 2050 5.3.1 Strategic Goal 1 (Strategic goal of space science) and the roadmap