Abstract: Agricultural informatization is the important method to realize agricultural modernization for China. With the development of multi-way audio-visual transfer technology based on 3G, people urgently needs the audio-visual communication tool and remote professional diagnosis system. The author used open-source system Open Meetings to design and secondary develop, and realized remote video communication among agricultural users, agricultural technicians and agricultural professors. This system had been integrated in agricultural technology extension informatization platform, and supported serving agriculture, rural areas and peasant and agricultural informatization. The actual results showed that: the system has effectively promoted agricultural technology extension and information resources integration after the system deployment.