Building automation system today employs an array of subsystems, communication protocols, data formats and software platforms. Some of these are proprietary, others are standards-based, but in neither case can true integration and interoperability be achieved. In addition to this, the traditional isolated subsystem within a building prevent renter and visitor from easily accessing the building resource and property manager from managing and maintaining the building. To address these issues, we describe a novel type of intelligent building system that merges IT technology with automation control technology. It allows devices from different manufactures to be integrated together seamlessly within one WEB-enable automation system; that enable property manager configuring, monitoring, and maintenance of heterogeneous subsystems with a unified application from a browser anywhere and anytime. It is seen that this approach provides the possibility to leverage current building automation technology into next high level.