Identifier distribution method and system

The invention discloses an identifier distribution method. The identifier distribution method specifically includes an STA (non-AP (access point) station) sending a first wireless frame to an AP; and the AP sending a second wireless frame to the STA, and the second wireless frame carrying grouping identifier information for distributing the STA or carrying the grouping identifier information for distributing the STA and novel station identifier information. The AP can also carry novel grouping identifier information and/or novel station identifier information for redistributing the STA in a re-association response frame sent to the STA when the STA sends a re-association request frame to the AP. The invention further discloses an identifier distribution system correspondingly. Terminals are distinguished by the grouping identifier information and the station identifier information, and accordingly number shortage of AID (association identifier) can be avoided, and support can be provided for grouping management of the terminals.