A method of summarizing markup-type documents is provided to automatically summarize the documents more quickly as well as being suitable for providing a user with a reliable document quality through true summary to the documents. This method includes the steps of previously establishing weights of the tags, respectively, extracting at least one of the markup-type documents when a random user requests a document search using a specific keyword, computing weights for the respective elements of the extracted markup-type document by applying the previously established weights thereto, and a fourth step of arranging the elements in a manner that the element having the computed value of a higher order is arranged with priority to generate a summary document with the contents of the corresponding elements.