1. A system for accumulating social relation information for social network services, comprising: a user location profile management unit for collecting at preset periods location profile information of a user; a user profile management unit for collecting and storing user profiles preset by the user; a social activity tracking unit for collecting profiles from social activities of the user; and a social relation information generation unit for collecting pieces of information and extracting new social relation information based on correlations between the pieces of collected information to generate a social relation ontology, wherein the pieces of information are received from the user location profile management unit, the user profile management unit and the social activity tracking unit.