Abstract: This paper discourses on the necessity of analysis on object library of Office system.For example with word software，word server is summarized，and the interfaces and corresponding implementation classes of seven components in Word server are gived，at the same time，the hiberarchy of the main interface objects is explained.Lastly，the methods used to extract document attributes of Word are presented.And by means of implementation of word-document analysis tool，the practice shows that the above methods are true and feasible.

Key words: word server, analysis of interface, extracting of document attribute

摘要： 论述了对Office对象库分析的必要性；以Word软件为例，对Word服务器进行了概述，给出了构建Word服务器的7个组件接口以及对应的实现类，并对主要接口对象之间的层次关系进行了说明；介绍了Word文档属性的提取方法，通过Word文档分析工具的实现证明所给方法是正确并且可行的。

关键词: Word服务器, 接口解析, 文档属性提取