Agricultural information service plays an important role in speeding up the construction of agricultural information,and the processing capability of agricultural information resources demands the support of information and technology urgently. In this paper,cloud computing was applied in agricultural information service system,the internet cloud computing technology were used to provide a favorable reference for innovative agricultural information service,creat a new interactive,easy to operate,low-cost network terminal mode. It meets the information needs of different areas of agriculture,which shows the advantages of cloud computing technology applied in agricultural information service system。