Shenghua BAS-SH94900 series building automation system is researched and developed independently by the Nanjing Fire Group Company. It adopts the foreign advanced technology is very reliable, has good performance, distributed control, centralized monitoring and management functions. This series product can be flexibly controlled and has very good performance. It can be used both by local control and by remote control via MODEM. Each controller bus is connected to a PC. Each PC can connect with two controller buses to form local system. Several PCs can be connected together through local area network(LAN). The system can be extended to adapt various kind or building and buildings. All of BAS-SH94900 PCs use Window95/Windows NT operating system. The user's management work is made very simple b using the same graphics interface of windows. While providing a comfortable environment, satisfying the different requirements of customers, the system need least power consumption. Various electrical equipment in the building operates safely, thus utilizes each equipment's functions, improving the building's automatic management level.