The invention relates to the wireless communication field, and discloses a migration method serving a radio network controller and the radio network controller, which ensures UE to carry out service RNC migration when receiving MBMS services. When no Iu connection exists between the source RNC and CN, the migration of the service RNC can be carried out by connectionless message interaction; connection can also be established in advance and then is released after the migration is finished; the message interaction required by the service RNC migration can also be carried out by an Iur interface between the source RNC and a target RNC.