This book constitutes the refereed proceedings of the 14th International Conference on Big Data, BigData 2025, held as part of the Services Conference Federation, SCF 2025, in Hong Kong, China, during September 27-30, 2025. The 15 full papers included in this book were carefully reviewed and selected from 25 submissions. The conference aimed to provide an international forum to formally explore various business insights into all kinds of value-added "agent for big data". Big Data is a key enabler in exploring business insights and economics of services.