The disclosure discloses a method, User Equipment (UE) and a system for realizing service continuity of a Multimedia Broadcast and Multicast Service (MBMS). The method comprises that: when a UE that is receiving or is interested in receiving the MBMS service moves, if the UE is in an idle mode, the UE selects a target cell with a same frequency as the MBMS service to perform a cell reselection or the UE uses a frequency of the MBMS as a highest-priority frequency to perform a cell reselection; if the UE is in a connected mode, a network side selects a target cell with a same frequency as the MBMS service to perform a handover according to an MBMS receiving state reported by the UE. With the disclosure, the MBMS service experience of users can be improved.