This book presents the proceedings of the 20th International Conference on Future Information Technology (FutureTech 2025) held in Changsha, China, April 24-26, 2025. It also discusses the state of the art in the development of Hybrid Information Technology, High Performance Computing, Cloud and Cluster Computing, Digital Convergence, Multimedia Convergence,  Human-centric Computing and Social Networks, and Bioinformatics and Bio-Inspired Computing in engineering, science, and other disciplines related to ubiquitous computing. This book is a great resource for students, researchers, and professors working in the field of ubiquitous computing.