Abstract: In this paper, the application of weak current intelligence in the field of construction as an example, combined with work experience, outlined the correlation between weak current intelligence and the field of construction; The principle of intelligent application of weak current is analyzed. The correlative factors affecting the weakening of intelligent application are expounded. On this basis, after the installation and debugging of the weak current intelligent system equipment, the application of the system is discussed in detail from the aspects of communication system, security system and weak current engineering.