A method for reporting a channel status performed by a base station, wherein the method comprises: transmitting, by the base station, configuration signaling to a user equipment, UE, wherein the configuration signaling comprises a reporting period of channel state information, CSI, of N cells in the M cells, wherein the M cells are for data transmission of the UE; transmitting, by the base station, channel status request signaling to the UE, wherein the channel status request signaling is used to instruct the UE to report the CSI of the N cells in the M cells, and the channel status request signaling is scrambled by using a dedicated channel state information-radio network temporary identifier, CSI-RNTI; receiving, by the base station, CSI of a cell that is in the N cells and that is managed by the base station, wherein the CSI is transmitted by the UE according to the reporting period; and M is an integer greater than 1, N is an integer greater than or equal to 1, and N≤M; wherein the CSI is transmitted by the UE according to the reporting period by using a physical uplink shared channel, PUSCH; wherein the channel status request signaling further comprises a physical resource block, PRB, and a modulation and coding scheme that are required to report the CSI of the N cells in the M cells; and the receiving, by the base station, CSI of a cell that is in the N cells and that is managed by the base station, wherein the CSI is transmitted by the UE according to the reporting period comprises: receiving, by the base station, the CSI of the cell that is in the N cells and that is managed by the base station, wherein the CSI is transmitted by the UE on the PRB according to the reporting period by using the modulation and coding scheme. transmitting, by the base station, configuration signaling to a user equipment, UE, wherein the configuration signaling comprises a reporting period of channel state information, CSI, of N cells in the M cells, wherein the M cells are for data transmission of the UE; transmitting, by the base station, channel status request signaling to the UE, wherein the channel status request signaling is used to instruct the UE to report the CSI of the N cells in the M cells, and the channel status request signaling is scrambled by using a dedicated channel state information-radio network temporary identifier, CSI-RNTI; receiving, by the base station, CSI of a cell that is in the N cells and that is managed by the base station, wherein the CSI is transmitted by the UE according to the reporting period; and M is an integer greater than 1, N is an integer greater than or equal to 1, and N≤M; wherein the CSI is transmitted by the UE according to the reporting period by using a physical uplink shared channel, PUSCH; wherein the channel status request signaling further comprises a physical resource block, PRB, and a modulation and coding scheme that are required to report the CSI of the N cells in the M cells; and the receiving, by the base station, CSI of a cell that is in the N cells and that is managed by the base station, wherein the CSI is transmitted by the UE according to the reporting period comprises: receiving, by the base station, the CSI of the cell that is in the N cells and that is managed by the base station, wherein the CSI is transmitted by the UE on the PRB according to the reporting period by using the modulation and coding scheme.