Abstract: Cloud computing plays an irreplaceable role in agricultural information service because of its strong computing power，high reliability and virtuality.Cloud computing can provide a huge amount of data resources for agricultural information services，greatly improving speed of building agricultural information service platform.Promotion of cloud computing technology in agricultural information service is research focus of agricultural information service.Application of cloud computing technology in agricultural information service was investigated，and is innovation in agricultural science and technology，promotion and use of farmers and other aspects was introduced.Using cloud computing technology could innovate agricultural information services，and lay a solid foundation for its better service to agriculture，farmers and rural areas.