当前网络中普遍存在间谍软件、垃圾信息、恶意代码(病毒)、恶意插件等各类网络隐患,严重威胁网络安全,同时又因为其本身技术的不断更新,使人防不胜防。本文根据计算机网络的特性,提出了构建计算机网络与信息安全系统的措施及其关键技术,希望可以解决当前常见的计算机网络与信息安全问题。 Currently, there are common network hidden dangers such as spyware, spam, malicious code (viruses) and malicious plug-ins, which pose a serious threat to network security. At the same time, it is hard to be prevented by constantly updating its own technologies. According to the characteristics of computer network, this paper puts forward the measures of building computer network and information security system and its key technologies, hoping to solve the common computer network and information security problems.