The present invention discloses multimedia ringing back tone method. It includes Calling MSC server receiving calling and originating calling to called MSC server, calling MSC server receiving called MSC server information of successful paging called user; calling MSC server making calling user with MRS media ability negotiation, then notifying MRS playing multimedia ringing back tone to calling user, MRS according to media ability negotiation result playing multimedia ringing back tone to calling user. The present invention also discloses a multimedia ringing back tone system, which contains HLR, MSC server, MRS and media gateway MGW, wherein MSC server respectively connected with HLR, MRS and MGW; MRS connected with MGW. Said invention provided scheme can make multimedia ringing back tone service being realized in third generation network, coexisting third generation, second generation mixing network, and third generation network original audio ringing back tone service with multimedia ringing back tone service, to ensure ringing back tone service normal use.