In order to solve the farmer’s agricultural production information’ acquisition problems with a 3G terminal, a 3G-terminial agricultural information service system method is proposed in the paper. With the advent of 3G and WLAN technologies, the rural and urban areas in which 3G coverage is complemented by WLAN deployments is becoming available. The agricultural information services limited by network bandwidth and geography will be changed completely. In the paper, we will propose an architecture of the 3G-terminial agricultural information service. First, we present the design and implement of the GAIS architecture for mobile multimedia information service. Then the agricultural content-based information services are described in detail. Finally, we present a prototype agricultural information service to show our experiment for the agricultural information service in a mobile information context.