The invention relates to a cloud computing application architecture and a cloud computing service method based on mixed cloud. The architecture comprises a main server, a data storage server, a data acquisition server, a data migration server, a cloud storage access component, an access statistical server and a database server, wherein the main server is separately connected with the data storage server, the data acquisition server, the data migration server, the cloud storage access component and the access statistical server; the data storage server and the data acquisition server are separately connected with the cloud storage access component, the access statistical server and the database server; the cloud storage access component is separately connected with the mixed cloud and the access statistical server; the database server is connected with the data migration server; and the cloud computing service method comprises a data storage step and a data acquisition step. Compared with the prior art, the architecture and the method have the advantages of high safety, low cost, strong reliability, good flexibility and the like.