A telemedicine system based on cloud computing is designed. It provides electronic medical and health records management mechanism, and makes android-based mobile terminal a remote mobile medical tool, also, it builds various "Cloud service" resources for doctors to freely use, such as content-based image retrieval(CBIR), virtual 4D CT, automatic detection of tumor etc. This system solves problems people face when managing personal health and medical information and resorting to medical advice in other regions, meanwhile, it mitigates the problem of the uneven distribution of medical resources. It is a prospective medical service platform with cloud computing application.