9. A social network searching system, comprising: a user profile storage storing user profiles; a profile search engine, configured for obtaining a target member by searching the user profile storage based on a profile query from a query user, obtaining a plurality of node members between the query user and the target member, and calculating a plurality of relationship scores indicating a relationship phase between each and every two of the query user, the target member and the plurality of node members; and a linkage construction engine configured for constructing a relationship linkage and extracting an optimal path from at least two paths from the query user to the target member according to the relationship linkage.
9. A social network searching system, comprising: a user profile storage storing user profiles; a profile search engine, configured for obtaining a target member by searching the user profile storage based on a profile query from a query user, obtaining a plurality of node members between the query user and the target member, and calculating a plurality of relationship scores indicating a relationship phase between each and every two of the query user, the target member and the plurality of node members; and a linkage construction engine configured for constructing a relationship linkage and extracting an optimal path from at least two paths from the query user to the target member according to the relationship linkage. 11. The social network searching system of the claim 9 , wherein each relationship score is defined in range from 0 to 1, and each of the at least two path values is calculated by multiplying passed relationship scores in each of the at least two paths.