The invention discloses a switching method and device. The method comprises the steps that measurement information reported by UE is received, wherein the measurement information comprises the reference signal reception quality RSRQ and the reference signal reception power RSRP of X cells; X cells comprise Y cells in the source cell group where the UE is located and Z cells not belonging to the source cell group; whether the cell group needs to be switched for the UE is determined based on the measurement information and a preset switching condition; and when the cell group needs to be switched for the UE, a target cell group is determined for the UE, and the UE is switched from the source cell group to the target cell group. According to the technical scheme, the number of times of UE-triggered switching events is reduced; the signaling overhead of a core network is reduced; and the communication quality of a user is improved.