Patent ID: 8849788

Claim:
A method for determining an optimal connectable route to a target person based on a mutual intimacy index using an address book information of members provided by Internet service providers comprising: an address book build-up step of building up an address book DB server comprising a profile information of the member including a name, a contact information, an address, an office information, an e-mail address, and additional information inputted directly by the member and an intimacy information of the acquaintances, who are in the human relations of each member having a static relationship information defined by a blood relation, a original-hometown regional relation and a school alumni relation between the member and his acquaintance and a dynamic relationship information illustrating a frequency of a social activity thereof, and a mutual intimacy index calculated by the intimacy information; a target person input step of receiving a desiring target person from a specific member; a route search step of searching and finding out connectable routes between the specific member and the target person; and a route determining step of determining and outputting an optimal connectable route among the connectable routes in the light of the mutual intimacy index and the number of relay steps between the specific member and the target person all together, wherein, in the route determining step, when there are lots of connectable routes, the optimal route is determined by a connectable route for which a unit mutual intimacy index, which is obtained by dividing the mutual intimacy index by the number of the relay steps between the specific member and the target person, is highest.