Abstract: Abstract：From 2010 to 2013, China Geological Survey (CGS) launched a project “CO2 Geological Storage Potential and Suitability Assessment and Pilot-Project in China”, which has promoted CO2 geological storage study in China. Based on the complex geological conditions of basins in China, the authors have established CO2 geological storage potential and suitability assessment system suitable for China, and assessed CO2 geological storage potential and suitability about the 417 land and shallow marine sedimentary basins with the area greater than 200 km2. The CCS pilot-project in Ejin Horo Banner of Ordos City within Inner Mongolia was carried out, which served as the first coal-based CCS pilot project in deep saline aquifers in China and the largest one in the world. Some scientific and technical breakthroughs in such aspects as drilling, perfusion, sampling and monitoring were achieved. The substantial progress in the basic theoretical researches such as physical chemical and biological process, simulation, environmental impact and safety risk assessment of CO2 geological storage has also been obtained.