近年来，随着城市化进程的不断加快，城市规划的计算机辅助设计越来越受到广泛的重视。通常城市规划采用的方法是将多种辅助软件混合使用，用于进行城市规划和方案设计，但是这种方法存在多种软件间协同性不强、缺乏有效的自动评估方法等问题。为了更好地利用计算机进行城市规划，首先简要介绍了计算机辅助城市规划系统CAUPS的工作原理和主要模块，然后着重介绍CAUPS中实现自动评估过程的关键技术——评估模型定义系统的设计和实现技术。该项技术首先通过提供一组简单的操作运算符以及实体对象关系的解析支持来实现评估模型的描述功能；然后由用户根据实际规划的需要交互地选择构成特定评估模型的规则和实体以实现对评估模型的定制。

In recently years, with the increment of urbanization, the computer aided urban planning has become more and more important. Generally, the computed aided process is accomplished through the help of multiple software systems. There are several issues with the above solution such as weak applicability, lack of efficient auto-evaluation method, etc. The working principle and main modules of CAUPS are briefly introduced. The key technique for auto-evaluation, i.e., the design and implementation of evaluation models definition system in CAUPS, is emphasized. A series of simple operations and resolution for the entity relations are firstly provided to describe all the possible evaluation models, and then users can customize their evaluation models by combining the proper entity relations and entities based on the practical planning demand.