Agricultural informatization has entered a rapid development period. With the improvement of basic rural information infrastructure and the Agricultural informatization resource increase, the information service models also need reform and innovation. The Consultative knowledge service system is people-oriented and support the user interactive information exchange, and it can also provide the remote technical consultation, Remote diagnosis and the final solution for the farmers. In this paper, we used open-source system OpenMeetings to design and secondary develop, and realize remote video communication among agricultural users, agricultural Technicians and agricultural professors. This system has been integrated in China Agricultural Technology Extension informatization platform, and support serving agriculture, rural areas and peasant and agricultural informatization. The actual test result shows that the system has effectively promoted Agricultural Technology Extension and information resources integration.