The International Conference on Earth Science and Hydraulic Engineering in 2025 will be held in Changsha, China, with the aim of bringing together experts, scholars, engineers, and industry practitioners in the fields of Earth Science and Hydraulic Engineering from around the world to explore cutting-edge technological breakthroughs and industrial applications, and promote the collaborative innovation and development of the two disciplines. The conference focuses on two core areas: geology, geophysics, geochemistry, atmospheric science, marine science, environmental science, and other topics in the field of Earth sciences, with a focus on key issues such as the evolution of the Earth system, natural disaster warning, and resource exploration and sustainable utilization; The field of water conservancy engineering focuses on water resource management, water environment protection, hydraulic structure design and construction, hydropower technology, flood control and disaster reduction, and ecological restoration, exploring innovative applications of water conservancy engineering in addressing climate change and ensuring water resource security. The conference format includes keynote speeches, thematic discussions, technical workshops, and case sharing. For example, the topic of "Water Resource Management under Climate Change" will discuss the impact of extreme weather on water conservancy projects and response strategies; The roundtable dialogue on "Application of Earth Information Technology in Water Conservancy Engineering" will analyze practical cases of remote sensing, GIS and other technologies in water conservancy engineering. The conference specially set up a "Young Scholars Forum" and a "Industry University Research Matchmaking Conference" to provide a platform for emerging researchers to showcase and promote the transformation of scientific research achievements. The conference results will form a special report, providing reference for technology research and development, industrial application, and policy formulation, and helping to build an innovative ecosystem that deeply integrates earth science and water conservancy engineering. Through the collision of multiple perspectives, the conference aims to promote the interdisciplinary integration of the two disciplines and contribute wisdom to the sustainable management of global water resources and the protection of the Earth's environment. Participants will gain a deeper understanding of the latest developments in the fields of earth science and water conservancy engineering through participating in seminars and observing technical demonstrations, and jointly explore the development path of smart water conservancy and earth science in the future.