17. A member searching and analyzing method of social network, comprising: providing 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 the query user to the target member according to the relationship linkage; obtaining a target member by searching a user profile storage based on the profile query from the query user; constructing the relationship linkage from the query user to the target member; extracting the optimal path from the query user to the target member according to the relationship linkage; and recommending the optimal path to the query user.
18. The member searching and analyzing method of the claim 17 , 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.