Instant communication system, method and apparatus

The present invention discloses an instantaneous communication method, the key lies in that a server receives the requirement of the first user examining the shared information of good friends of thesecond user which is emitted by the UE and emits the shared information of good friends of the second user to the UE. With the method, user can search other user or user group according to the relevancy of the social relations between users and can add the interest and the social relevancy of the instantaneous communication system, which is beneficial to exert the function of the instantaneous communication platform. The present invention also discloses an instantaneous communication system, a server and a UE.