1. A system for drawing a patent map using a technical field word, comprising: a storing unit for receiving a download of patent information from at least one patent information providing site and storing it; an extractive object selection and sentence extracting unit for selecting at least one word extraction object and extracting a sentence of the selected word extraction object from the patent information stored at the storing unit; a clause separating unit for separating, in a unit of a clause, the sentence of the extractive object selected in the extractive object selection and sentence extracting unit; a word extracting unit for counting the number of words in the sentence which is separated in a unit of a clause in the clause separating unit, calculating weight values and the sum of the weight values by respective words, and extracting the word; a word matching unit for matching the word extracted from the word extracting unit, with a patent; a patent map drawing unit for drawing a patent map referring to data matched in the word matching unit; and a patent map drawing controlling unit for controlling the word extraction object of the extractive object selection and sentence extracting unit.