Abstract: There are resources concentrated, low utilization and poor service level for tropical agricultural science and technology in our country. By analyzing the three existing issues and the agricultural experience in cloud services applications at home and abroad, combining with tiered service model of cloud computing, the four-tier structure of cloudbased information service platform for tropical agricultural is designed, and described in detail. The four tiered structure are infrastructure layer, data resource layer, platform services layer and application layer. For the characteristics of farmers decentralized operation and low literacy levels in hot area, a multi -terminal application mode for the cloud platform services is designed. Finally, the cloud computing advantages and prospects are analyzed in tropical agricultural science and technology information, resourcesintegration and promotion of services.