This book focuses on the future of China and its sustainable development, and summarizes the implications, forms, causes, countermeasures and related rules of the main costs generated during a country's period of development, so as to provide a theoretical reference and decision-making consulting tools for institutions and scientific governance and management professionals. Combining China's national situation and development characteristics with the country as a unit, it uses case studies to propose the concept of cost theory and the theoretical system of national development cost. Focusing on the goals of innovation in nation building, common development and prosperity, as well as enhancement of people's net welfare, the book summarizes and draws conclusions about various aspects of national development, including economic development cost; political, social and cultural development cost; foreign opening-up development cost and nature development cost. It primarily establishes an indicator system of national development cost for promoting full-factor productivity and reducing development cost, and provides a theoretical basis for implementing the scientific political-achievement view.