Cloud computing has been proposed in the middle of the last century, it is the product of the development of computer technology. From the technical point of view, cloud computing is the external provision of services through the visualization's technology and distributed technologies. Cloud computing more widely applied to study the structure of the cloud computing system, and in-depth understanding of cloud computing technology is necessary. Is very meaningful for the development of cloud computing systems. Designed in a typical cloud computing system framework, including the central server, storage sub-node and client, and typical applications of cloud computing.