According to an embodiment of the present invention, a method of extracting key words of a scientific document may include: converting a scientific document into a morphologically analyzed scientific document consisting of words analyzed by nouns, adjectives, and verbs through morphological analysis; Constructing a document graph by setting a word of the scientific document as a vertex and giving an edge indicating a relationship between the word and the word; Calculating a importance score for the vertices in the document graph; Detecting location information of key phrase candidates and extracted key phrase candidates in the morphologically analyzed scientific document; Calculating scores of candidate key phrases according to scores of words included in key phrase candidates and lengths of key phrase candidates for each of the key phrase candidates; Reranking the ranking of the key phrase candidates by changing the score of each key phrase candidate according to the position information of the key phrase candidate; And determining a predetermined number of upper key phrase candidates among key phrase candidates that have been reranked as key words of the scientific document.
展开▼
