The invention relates to the technical field of the Internet, in particular to a desktop cloud system. It includes the access layer and the desktop cloud layer. The access layer deploys multiple access switches connected to multiple PC terminals. The desktop cloud layer deploys aggregation switches, core switches, storage, VDI desktop clusters, and application virtualization virtualization cluster, server virtualization cluster, virtualization management and desktop management, connection between aggregation switch and access switch, connection between core switch and aggregation switch, storage, VDI desktop cluster, application virtualization cluster, server virtualization cluster, and virtualization Both management and desktop management are connected to the core switch. The invention provides a desktop cloud system, which virtualizes desktops, application releases and servers through virtualization technology, realizes centralized management, and greatly improves reliability and usability.