A method for implementing the Multimedia Ring Back Tone (MRBT) service and Multimedia Caller Identification (MCID) service is disclosed. The method includes: if the network determines that the calling UE is an MCID service subscriber and determines that the called UE supports the MCID early media, the network negotiates the MCID early media with the called UE, and plays a MCID to the called UE if the negotiation succeeds; if the network determines that the called UE is an MRBT service subscriber and the calling UE supports the MRBT early media, the network negotiates the MRBT early media with the calling UE, and plays an MRBT to the calling UE if the negotiation succeeds. In addition, a system for implementing the MRBT service and MCID service is disclosed. The present invention enables the MRBT service and MCID service in an IP Multimedia Subsystem (IMS) so that users may use the multimedia services in the IMS and have a better experience.