1. A system for receiving data from a plurality of web servers and for extracting and recommending users of similar interests between the plurality of web servers, comprising: a user profile vector creation unit for collecting tag data from the plurality of web servers, performing standardization calculation on a degree of importance of each of one or more tags, and creating user profile vectors for respective users; a user similarity calculation unit for calculating user similarity between the respective users using the user profile vectors of the respective users created through the user profile vector creation unit; and a similar user extraction unit for extracting at least two users of similar interests using a value of the user similarity calculated through the user similarity calculation unit, wherein at least a first user of the at least two users is recommended to a second user of the at least two users.