2025 7th International Conference on Big-data Service and Intelligent Computation (BDSIC 2025) will be held in National Institute of Development Administration, Bangkok, Thailand during October 29-31, 2025. It aims to provide a forum for researchers, practitioners, and professionals from the industry, academia and government to discourse on research and development, professional practice in Big-data Service and Intelligent Computation. BDSIC 2019 was successfully held in Wuhan Institute of Technology, BDSIC 2020, 2021& 2022 were successfully held online, BDSIC 2023 was held online and offline combination in Singapore, BDSIC 2024 was held online and offline combination in Hong Kong. Scholars and researchers working in the field of Big-data Service and Intelligent Computation from all over the world are welcome to attend the conference and share your experiences and lessons with other enthusiasts, and develop opportunities for cooperation.