13. A method for modeling a user interest pattern in a user interest pattern modeling server, the method comprising: collecting a user's use history of a content; extracting a keyword from the use history of the content; extracting a first time pattern of the keyword; generating an extended keyword from the keyword; analyzing a second time pattern of the extended keyword based on the first time pattern; and modeling a user interest pattern for the keyword and the extended keyword based on the first and second time patterns.
13. A method for modeling a user interest pattern in a user interest pattern modeling server, the method comprising: collecting a user's use history of a content; extracting a keyword from the use history of the content; extracting a first time pattern of the keyword; generating an extended keyword from the keyword; analyzing a second time pattern of the extended keyword based on the first time pattern; and modeling a user interest pattern for the keyword and the extended keyword based on the first and second time patterns. 16. The method of claim 13 , wherein said extracting of the keyword comprises extracting the keyword from text data of the content and metadata of the content.