中梁山隧道是我国最长的一条公路隧道，为了确保隧道的使用功能和环境要求，设计了一套包括监测、监控、通风、照明、火警、消防等的机电工程系统．除介绍这套系统工程外，从系统理论的角度对隧道机电工程的系统性进行分析，并阐述了系统分析法对公路隧道机电工程具有实用意义． Zhongliangshan Tunnel is the longest road tunnel in China. In order to ensure the functional and environmental requirements of the tunnel, a set of mechanical and electrical engineering systems including monitoring, monitoring, ventilation, lighting, fire alarm and fire fighting are designed. In addition to introducing the system engineering, the systematic analysis of tunnel electromechanical engineering is made from the perspective of system theory, and the systematic analysis method is of practical significance to the mechanical and electrical engineering of highway tunnels.