1. A document management system comprising: image read means for reading image information of a document and outputting the image information; storage means for storing the image information output from said image read means; means for character-recognizing character information included in the image information output from said image read means, and converting the character information to text data; means for preparing a table for managing said document, on which a plurality of words included in the text data, an identification code for the document, and a page number of a page in the document on which the words are present, are associated; means for inputting a search keyword; search means for specifying the document in which the search keyword is present and the page number, with reference to the table on the basis of the search keyword; and display means for displaying, in an associated manner, an image of a top page of the document specified by said search means and the page number.