The invention discloses a multi-identity network social intercourse system and an implementation method. The steps thereof are as follows: A: registering to be a member; B: logging on by using a registered user name obtained in the step A, and filling in the personnel information and a head portrait of real identity; C: a user chooses whether activating the virtual identity or not; D: activating the virtual identity, and filling out the information of the virtual identity; E: according to the requirement of the member, choosing the switching of the identities, and switching into the state with two identities; F: according to the identity switching of the step E, the switched state is the state of real identity; and G: according to the identity switching of the step E, the switched state is the state of virtual identity. The identities are respectively connected with the personnel information, the relationship, the resources and the application and operation of the system. The invention favorably protects the privacy of the user, and favorably combines real-name registration with the anonymous registration, thereby providing a flexible and intimate platform for the user. The user can establish a stable network of social relationship, gain real friendship, etc. The system has the advantages of simple structure and easy operation.