The concept of multi-purpose marine structures is particularly promising in this era, especially for revolutionizing traditional ocean engineering practices. However, fundamental concepts, hydrodynamic methods, and design criteria differ significantly from those of traditional marine structures. Therefore, providing insights into the hydrodynamic analysis of these novel structures is crucial for advancing coastal and offshore engineering.  This book offers a comprehensive introduction of the hydrodynamics of multi-purpose coastal and offshore structures, targeting engineers and researchers in field of coastal and offshore engineering. Its main topics include an overview of multi-purpose marine structures, the formulation of hydrodynamic models, and the performance evaluation frameworks tailored for these structures. This book provides solutions for evaluating the performance of multi-purpose marine structures and designing such structures. Through the introduction of advanced hydrodynamic methods and detailed case studies, readers gain valuable insights into the design process, utilizing advanced techniques and the latest research findings. Overall, this book serves as a valuable resource for professionals aiming to navigate the fundamentals involved in the design, analysis, and performance evaluation of multi-purpose marine structures.