My paper mainly introduces some applications of the technologies of the Internet of Things (IoT) which offer capabilities to identify and connect worldwide physical objects into a unified system. With the rapid development of the construction industries, people are eager to get more intelligent living conditions. The Intelligent Community Security System (ICSS) is becoming one of the biggest applications of the IoT. The purposes of the ICSS are preventing invasion, automatic property management, real-time alarm and quickly treatments of accidents, etc. The system can improve the community security automatically, the management efficiency and economize human resources. This paper describes the basic characteristics and architectures of the IoT and introduces an intelligent model to realize a practical and intelligent community management system.