The paper analyzes main communications network supporting and maintaining models firstly. After a comparison among several software designing methods, it makes a deep study on Object Oriented Design method and its modeling language UML. 本文首先比较分析了当前主要的通信网维护管理模型以及主要的软件设计方法,重点研究了面向对象方法及面向对象建模工具UML对系统进行建模的必要性。