In this paper, an overall architecture and service model of cloud service platform of sci-tech information based on cloud computing for agricultural research system were proposed, aiming at promoting the co-construction and sharing among information service institutions in agricultural research system. The platform will integrate resources and services of co-construction institutions into a shared body, and form a new science and technology information service system to provide network infrastructure, resources, platform and various application services for agricultural research system. And through dynamic management and distribution of a variety of services, it will meet the needs of users at different levels, such as institutions, academic teams and individuals and so on.