8. An information search system, comprising: an information processing apparatus configured to send a search option input by a user; and an information search apparatus coupled to the information processing apparatus via a network and configured to: determine a search term based on the search option received from the information processing apparatus, the search term including an extracted search term that is extracted from the search option; search a document database to obtain a document that matches the search term; send a search result to the information processing apparatus, the search result including document information identifying the document that matches the search term and relevancy information indicating a degree of relevancy between the search term and the document, wherein the information processing apparatus is further configured to display the search result in a format indicating the correspondence relationship of the document information, the search term, and the relevancy information, wherein the format indicating the correspondence relationship is a matrix, the matrix including a cell that represents relevancy information between the search term and the document, the matrix is displayed on a display device, and the cell, which is linked to the document, is configured to be activated by a user input and to cause the information processing apparatus to display at least a portion of the document having the search term with the search term displayed in the document differently from the other words in the document, wherein the matrix includes a row including a matrix element representing one of the search term or the document information, a column including a matrix element representing another one of the search term or the document information, and the cell being provided at a location where the matrix element representing the search term and the matrix element representing the document information meet and indicating the degree of relevancy between the search term represented by the corresponding matrix element and the document identified by the document information represented by the corresponding matrix element, and wherein, when the search term includes a plurality of search terms, the information search apparatus is further configured to generate a plurality of search results for each one of the plurality of search terms, and the information processing apparatus is configured to display the plurality of search results in the format indicating the correspondence relationship of the document information, the search term, and the relevancy information for each one of the plurality of search results; and the relevancy information is displayed visually in a graphical image having a shape representing the relevancy information.
8. An information search system, comprising: an information processing apparatus configured to send a search option input by a user; and an information search apparatus coupled to the information processing apparatus via a network and configured to: determine a search term based on the search option received from the information processing apparatus, the search term including an extracted search term that is extracted from the search option; search a document database to obtain a document that matches the search term; send a search result to the information processing apparatus, the search result including document information identifying the document that matches the search term and relevancy information indicating a degree of relevancy between the search term and the document, wherein the information processing apparatus is further configured to display the search result in a format indicating the correspondence relationship of the document information, the search term, and the relevancy information, wherein the format indicating the correspondence relationship is a matrix, the matrix including a cell that represents relevancy information between the search term and the document, the matrix is displayed on a display device, and the cell, which is linked to the document, is configured to be activated by a user input and to cause the information processing apparatus to display at least a portion of the document having the search term with the search term displayed in the document differently from the other words in the document, wherein the matrix includes a row including a matrix element representing one of the search term or the document information, a column including a matrix element representing another one of the search term or the document information, and the cell being provided at a location where the matrix element representing the search term and the matrix element representing the document information meet and indicating the degree of relevancy between the search term represented by the corresponding matrix element and the document identified by the document information represented by the corresponding matrix element, and wherein, when the search term includes a plurality of search terms, the information search apparatus is further configured to generate a plurality of search results for each one of the plurality of search terms, and the information processing apparatus is configured to display the plurality of search results in the format indicating the correspondence relationship of the document information, the search term, and the relevancy information for each one of the plurality of search results; and the relevancy information is displayed visually in a graphical image having a shape representing the relevancy information. 11. The system of claim 8 , wherein the information processing apparatus is further configured to determine an arrangement of a plurality of matrix elements included in the matrix based on the relevancy information.