A method for configuring a control channel, applied to a network-side device, the method comprising: transmitting, to a terminal, downlink control information, DCI, in a physical downlink control channel, PDCCH, wherein the DCI comprises indication information for indicating a slot in which PDCCH does not need to be monitored subsequently; and transmitting, to the terminal, the PDCCH in a slot or a time-frequency resource where a fallback PDCCH subsequent to the PDCCH is located, when determining that the terminal does not successfully receive the DCI in the PDCCH, wherein the method further comprises: configuring a slot set or the time-frequency resource where the fallback PDCCH is located by a DCI, or a radio resource control, RRC, signaling, or a media access control control element, MAC CE, wherein the determining that the terminal does not successfully receive the DCI in the PDCCH comprises: determining that the terminal does not successfully receive the DCI in the PDCCH, in the case that an acknowledgement or negative acknowledgement, ACK/NACK, signal transmitted by the terminal is not received on an ACK/NACK resource corresponding to a downlink, DL, grant in the PDCCH; or determining that the terminal does not successfully receive the DCI in the PDCCH, in the case that uplink, UL, data transmitted by the terminal is not received on a physical uplink shared channel, PUSCH, resource corresponding to a UL grant in the PDCCH. transmitting, to a terminal, downlink control information, DCI, in a physical downlink control channel, PDCCH, wherein the DCI comprises indication information for indicating a slot in which PDCCH does not need to be monitored subsequently; and transmitting, to the terminal, the PDCCH in a slot or a time-frequency resource where a fallback PDCCH subsequent to the PDCCH is located, when determining that the terminal does not successfully receive the DCI in the PDCCH, wherein the method further comprises: configuring a slot set or the time-frequency resource where the fallback PDCCH is located by a DCI, or a radio resource control, RRC, signaling, or a media access control control element, MAC CE, wherein the determining that the terminal does not successfully receive the DCI in the PDCCH comprises: determining that the terminal does not successfully receive the DCI in the PDCCH, in the case that an acknowledgement or negative acknowledgement, ACK/NACK, signal transmitted by the terminal is not received on an ACK/NACK resource corresponding to a downlink, DL, grant in the PDCCH; or determining that the terminal does not successfully receive the DCI in the PDCCH, in the case that uplink, UL, data transmitted by the terminal is not received on a physical uplink shared channel, PUSCH, resource corresponding to a UL grant in the PDCCH. configuring a slot set or the time-frequency resource where the fallback PDCCH is located by a DCI, or a radio resource control, RRC, signaling, or a media access control control element, MAC CE, wherein the determining that the terminal does not successfully receive the DCI in the PDCCH comprises: determining that the terminal does not successfully receive the DCI in the PDCCH, in the case that an acknowledgement or negative acknowledgement, ACK/NACK, signal transmitted by the terminal is not received on an ACK/NACK resource corresponding to a downlink, DL, grant in the PDCCH; or determining that the terminal does not successfully receive the DCI in the PDCCH, in the case that uplink, UL, data transmitted by the terminal is not received on a physical uplink shared channel, PUSCH, resource corresponding to a UL grant in the PDCCH. determining that the terminal does not successfully receive the DCI in the PDCCH, in the case that an acknowledgement or negative acknowledgement, ACK/NACK, signal transmitted by the terminal is not received on an ACK/NACK resource corresponding to a downlink, DL, grant in the PDCCH; or determining that the terminal does not successfully receive the DCI in the PDCCH, in the case that uplink, UL, data transmitted by the terminal is not received on a physical uplink shared channel, PUSCH, resource corresponding to a UL grant in the PDCCH.