Burglar alarm system is general by intrusion detectors, alarm controller and turning center (hardware and software). It is the simplest form of local (family, unit, etc.) alarm system, it is part of the intrusion detector and local alarm controller, as well as sound and light alarm (can be alarm controller embedded, also can be an external mode). Complex security alarm system can have thousands of intrusion detector, receiving alarm system can be scattered around the anti-theft alarm controller (regional) and alarm center of turning into a unit. Center called machine has a police blotter, time display, data storage, alarm, output, and other functions, and have an address code alarm output to the PC, the PC in the database will provide alarm unit (region), the alarm time, alarm category, alarm unit of information (address, telephone number, unit leaders or contacts), specific emergency alarm and point using the intrusion detectors. May, at the same time, there were warning ChuJing and ChuJing after report and case, storage and ChuJing staff on the treatment of the results and ChuJing time and details.