从物理安全、主机安全、网络安全、应用安全和数据安全五个方面介绍网络信息安全等级保护建设,结合特定的信息系统(医院信息管理系统),介绍基于等级保护的网络安全技术要求、安全策略及安全技术,可供用户的等级保护建设参考。 This paper introduces the construction of network information security level protection from the aspects of physical security, host security, network security, application security and data security, and introduces the network security technology requirements based on level protection and the security policy based on the specific information system (hospital information management system) And security technology, for the protection of users level reference building.