从软件工程学的角度出发，概括地阐述了水工安全监测图形系统从需求分析到系统建模的实现过程．论述了系统中安全监测设施图例单元库的建立、管理和操作的问题．结合该系统中的自动化功能模块，探讨了在ＭｉｃｒｏＳｔａｔｉｏｎ 二次开发工具ＭＤＬ环境下元素信息的提取问题，并阐述了自动工程量表绘制和单元标注这两项自动功能模块的实现过程． From the perspective of software engineering, this paper summarizes the realization process of hydraulic safety monitoring graphic system from requirement analysis to system modeling. The establishment, management and operation of the legendary cell library of safety monitoring facilities in the system are discussed. Combined with the automatic function module in the system, the paper explores the extraction of element information under the MDL environment of MicroStation secondary development tool, and expounds the realization process of two automatic function modules, automatic engineering scale drawing and cell labeling.