In recent years, with the accelerated development of social informatization, digital economy has gradually become the core force of economic growth in various countries. As the carrier for the digital economy, the number of IDCs is also increasing day by day, and their construction volume and scale are expanding. Energy consumption and carbon emissions are growing rapidly as IDCs require large amounts of electricity to run servers, storage, backup, cooling systems and other infrastructure. IDCs are facing serious challenges of energy saving and greenhouse gas emission. How to achieve green, low-carbon and high-quality development is of particular concern. This paper summarizes and classifies all the current green energy-saving technologies in IDCs, introduces AI-based energy-saving solutions for IDC cooling systems in detail, compares and analyzes the energy-saving effects of AI energy-saving technologies and traditional energy-saving technologies, and points out the advantages of AI energy-saving solutions applied in green IDCs.