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社会治安环境的复杂性为公安部门的执法行动带来了很大困难。为维护社会的长治久安，应提倡科技兴警。基于地理信息系统、遥感、全球定位系统以及决策支持系统的公安预警信息系统，可以极大地改善公安机关的快速反应能力、出警的准确性和破案效率。重点介绍了基于上述技术的公安预警信息系统的构成及其主要功能。“,”Complexity of social security of public surroundings makes it much difficult that police department enforces the law. In order to defend the social stability and security， police should be armed with science and technology. Police precaution information system which based on GIS， RS， GPS and DSS can extremely promote the ability of fast reaction of police department， the precision of police attendance and the efficiency of getting rid of the legal case. The formation and main functions of the police precaution information system are concisely introduced in this paper.