A method, user equipment and system provide simultaneous Push-To-Talk (PTT) over Cellular (PoC) multimedia services. After a PoC client participates in multiple sessions according to a simultaneous PoC multimedia service or Enhanced Simultaneous Session Support (ESS) set by a user for a PoC multimedia call service, a PoC server can simultaneously transmit the media streams to the PoC client without filtering when media streams of the same media type are transmitted in different sessions. The client can set simultaneous multi-reception modes on a session-by-session basis according to a user's intention, and on a media type-by-media type basis in each session.