The intelligent integrated automation system is a highly nonlinear complex control system. The MAS theory is introduced into the IB(Intelligent Building) field. The model of the intelligent integrated automation system is established by using the thought of multi-agent. The distributed parallel master control algorithm is given after synthesizing actual systems. The realization mechanism of the coordinate control system which lies in the communications of threads and processes is analyzed according to the linkages between subsystems. The method of using KQML language describe the coordinate control process is explained by the case of the bugging signal.