关键词: 分词研究，文本分类，信息抽取，信息检索，文本自动摘要

Abstract: The object of text information processing is to analyze and transact information about text from superficial to interior, here to there. It includes extracting information from the text file, getting some meaning hidden in the text by analyzing and mining it, We discussed the work about text information processing in detail,and summarized the history of text information processing. We summed up text information transaction into word segmentation, information extracting from text, text classification, text information retrieval, automatically summary from text etc, and summarized the correlation research work and pointed out the problem in the fields. At last we discussed the key technology and challenge in the text information processing and pointed out that the object is text semantics analysis, induction, deduction and conversion between text and language.

Key words: Word segmentation research,Text classification,Information extracting,Information retrieval,Automatically abstracting