Data communication in Centralized control pattern is a new method in the experimental information monitor and display software system, which can realize the functions including consolidated data- communicated interface, consolidated control, and the procedure of task flow. This method can save manpower resource, opitimize task mode and improve the veracity and reliability in the satellite launching mission. This article expounds the key technology. Furthermore, process communications, process synch- ronization, agent mechanism and memeory mapping are also discussed in detail.