1、引言医院信息系统能够实现患者信息的全过程追踪和动态管理,从而能够使患者的诊疗过程简单化,使医院就诊环境更好。医院信息系统采用的是局域网的形式,采用了网络技术,所以这也给一些不法分子可乘之机,入侵医院信息系统,非法获取医院信息与患者信息或造成医院信息系统瘫痪影响医院的正常工作,故医院信息系统的入侵检测技术的研究就非常有必要。2、入侵检测方法随着人们对于计算机网络安全的重视,对于网络入侵检测技 1, Introduction Hospital information system can realize the whole process of patient information tracking and dynamic management, which can make the patient’s treatment process is simplified, so that hospital treatment environment is better. Hospital information system uses the form of a local area network, using network technology, so it gives some criminals an opportunity to invade the hospital information system, illegal access to hospital information and patient information or paralyzed hospital information system affect the normal work of the hospital , So the research of intrusion detection technology of hospital information system is very necessary. 2, Intrusion Detection As people attach importance to the safety of computer networks, network intrusion detection technology