Disclosed in the present application are switching of a search space set group of a target cell, and a control method and apparatus thereof. In the present application, a terminal is flexibly instructed by means of downlink control signaling carrying a user dedicated instruction to perform search space set group switching, so as to implement search space set group switching for service features of different users and improve the energy-saving performance of the terminal. The method comprises: receiving control signaling that is sent by a network side and carries a user dedicated instruction, the user dedicated instruction being used for instructing a terminal to switch at least one target cell from a current search space set group to a target search space set group; and switching the at least one target cell from the current search space set group to the target search space set group according to the control signaling.