In order to solve the problem of the low baud rate of the integrated control of traditional intelligent building, the automatic control system is integrated and applied in the intelligent building integrated control. By collecting the integrated control signals of intelligent building，the control signals are converted into control data based on the automatic control system，and the control data and the integrated control data are integrated to establish the integrated control protocol of intelligent building. This paper calculates the integrated control frequency of intelligent building, inputs the integrated control quantity of intelligent building, and realizes the integrated control of intelligent building. The analysis results of the design example show that the designed control method is significantly higher than the control group, which can solve the problem of low baud rate of the traditional intelligent building integrated control.