This book highlights a comprehensive overview of the science, technology, and economic and industrial prospects of hydrogen energy and fuel cells. The book provides a deep understanding of the current research and industrial developments in hydrogen energy and fuel cells as well as their future prospect. The book begins with an overview of hydrogen energy, providing a foundation for understanding the importance and potential of this clean energy source. Following that the book discusses hydrogen supply, presenting conventional and innovative methods of producing and obtaining hydrogen for energy use. The book then explores the crucial aspects of hydrogen storage, transportation, and refueling, examining the technologies and infrastructure needed to support the widespread adoption of hydrogen energy. Then the book delves into hydrogen fuel cells, explaining how these devices convert hydrogen and oxygen into electricity and heat, and highlighting their efficiency and environmental benefits. The author then explores the various applications of hydrogen, including its latest use in transportation, power generation, and industrial processes. Finally, the book examines the ecological impact and future outlook of hydrogen energy, addressing the challenges and opportunities associated with its adoption. Particularly, the book provides a clear roadmap for the hydrogen energy industry by addressing macroscopic questions such as how the ecology of the hydrogen industry will be built and what the role of hydrogen is in the future global sustainable development. Overall, this book serves as an invaluable resource for students, researchers, engineers, and policymakers interested in understanding the current states and potential of hydrogen energy and fuel cells. With its comprehensive coverage and insights into the advancements in hydrogen fuel cell technology, this book contributes to the ongoing efforts to create a sustainable and cleaner energy future. Additional questions and answers via app: Download the Springer Nature Flashcards app free of charge and use exclusive additional material to test your knowledge. The English translation of this book, originally in Chinese, was facilitated by artificial intelligence. The content was later revised by the author for accuracy.