The book is a result of research on China’s digital intelligent transformation in the energy sector, with a focus on achieving the “dual carbon” goals. It includes industry application cases and provides a comprehensive demonstration of the theoretical basis, application mode, and future development trend of smart energy management systems. The theoretical section consists of four chapters, covering the theoretical system, technical basis, and technical system of smart energy management. It elaborates on energy theory and technology systems while exploring innovation mechanisms from both the supply side and demand side of energy management. The practical section summarizes application examples in key industries, social systems, important resources, and future smart energy development. It covers application technologies in transportation, construction, agriculture, cities, communities, and families, as well as smart electricity, water resources, and gas applications. Additionally, it discusses the main problems and challenges faced by smart energy development and looks forward to future trends in the industry. This book combines theory with practice, having both theoretical depth and practical significance.