CO₂ geological utilization and storage is considered as an effective approach to deeply cut anthropogenic CO₂ emissions. It is vital to enhance the amount of CO₂ stored in the subsurface, at the same time to ensure safe and long-term subsurface storage of CO₂ without any CO₂ leakage. Science and engineering research in modeling concepts, experimental approaches, safety assurance and emerging CO₂ geological utilization and storage technologies have driven the advancement of CO₂ geological utilization and storage in recent years. In order to encourage communication and collaboration in CO₂ geological utilization and storage research worldwide, a Sino-German joint symposium titled “Opportunities and Challenges in CO₂ Geologic Utilization and Storage” was organized in Wuhan and Stuttgart from February 22 to 24, 2023, bringing together experts from China, Germany, and other countries. The symposium was jointly organized by Institute of Rock and Soil Mechanics, Chinese Academy of Sciences and Institute for Modelling Hydraulic and Environmental Systems, University of Stuttgart with financial support from the Sino-German Center for Research Promotion. A two-site hybrid meeting was held (participants in China met in Wuhan, participants in Germany met in Stuttgart, and other participants joined the meeting online), attracting more than 100 participants from around the world. The latest studies in the field of CO₂ geological utilization and storage were presented at the symposium.