16. A reading system for reading patent documents, comprising a graphical screen divided into a plurality of document units arranged in a m×n manner, wherein m and n are greater than one, m is the total number of columns, and n is the total number of rows, respectively, each of the document unit being a screen area comprising a first sub-area for displaying a related drawing of one patent document and comprising a second sub-area for displaying at least one piece information selecting from title, assignee, inventor, abstract, application number, filing date, publication date, issue date, and document number of said one patent document.
17. The reading system of claim 16 , wherein the second sub-area displays more than two pieces of information of title, assignee, inventor, abstract, application number, filing date, publication date, issue date, and document number of said one patent document.