This book constitutes the refereed proceedings of the 9th International Conference on Edge Computing held as Part of the Services Conference Federation SCF 2025, Hong Kong, during September 27–30, 2025. The 7 full papers included in this book were carefully reviewed and selected from 12 submissions. EDGE 2025 aims to become a prime international forum for both researchers and industry practitioners to exchange the latest fundamental advances in the state-of-the-art practice of Edge computing, identify emerging research topics, and define the future of Edge computing.