9. A user-customized content providing method, comprising: searching a content set related to user's search query word; asking an apparatus for user preference information including a user profile and tag information, the user profile including a keyword collected in the apparatus and a point applied with a weight given per keyword; receiving the user preference information from the apparatus; determining a ranking of the content set according to the relation to the user preference information; and providing the ranked content set to the apparatus, wherein the keyword is detected by using tag information extracted from at least one tag of an anchor tag, a form tag and a combination thereof that are included in a web document outputted to the apparatus, and wherein the point per keyword is calculated based on data related to a number of selections of the keyword by the user, selection of the keyword comprising clicking the anchor tag including the keyword.
9. A user-customized content providing method, comprising: searching a content set related to user's search query word; asking an apparatus for user preference information including a user profile and tag information, the user profile including a keyword collected in the apparatus and a point applied with a weight given per keyword; receiving the user preference information from the apparatus; determining a ranking of the content set according to the relation to the user preference information; and providing the ranked content set to the apparatus, wherein the keyword is detected by using tag information extracted from at least one tag of an anchor tag, a form tag and a combination thereof that are included in a web document outputted to the apparatus, and wherein the point per keyword is calculated based on data related to a number of selections of the keyword by the user, selection of the keyword comprising clicking the anchor tag including the keyword. 14. The method of claim 9 , wherein keywords included in the user profile are limited to the Nth ranking, N being a natural number.