A method, device, and a storage medium for downlink channel monitoring are provided. The method may be applied to a terminal. The terminal may receive a control signal, and acquire the target cell range of the control signal. The target cell range may be used for determining a target cell made effective by the control signal. The terminal may determine a target downlink channel of the target cell according to the target cell range. The terminal may monitor the target downlink channel according to the control signal.