A method for monitoring a physical downlink control channel, PDCCH, performed by user equipment, comprising: receiving RRC signaling sent by a network side; and the method further comprising: determining a monitoring parameter based on the RRC signaling, wherein the monitoring parameter is associated with a downlink control information, DCI, format of a PDCCH to be monitored by the user equipment or a control channel element, CCE, aggregation level of the DCI format of the to-be-monitored PDCCH, or the monitoring parameter is associated with at least two of the DCI format of a PDCCH to be monitored by the user equipment, a CCE aggregation level of the to-be-monitored PDCCH, and the CCE aggregation level of the DCI format of the to-be-monitored PDCCH; wherein the DCI format comprises at least one of the following: a first DCI format and a second DCI format of a common search space, wherein the first DCI format is used to schedule a physical uplink shared channel of a serving cell, and the second DCI format is used to schedule a physical downlink shared channel of a serving cell; a first DCI format and a second DCI format of a UE-specific search space, wherein the first DCI format is used to schedule a physical uplink shared channel of a serving cell, and the second DCI format is used to schedule a physical downlink shared channel of a serving cell; and a first DCI format, a second DCI format, a third DCI format, and a fourth DCI format, wherein the first DCI format is used to schedule a physical uplink shared channel of a serving cell, the second DCI format is used to schedule a physical downlink shared channel of a serving cell, the third DCI format is used to schedule a physical uplink shared channel of a serving cell, and the fourth DCI format is used to schedule a physical downlink shared channel of a serving cell. determining a monitoring parameter based on the RRC signaling, wherein the monitoring parameter is associated with a downlink control information, DCI, format of a PDCCH to be monitored by the user equipment or a control channel element, CCE, aggregation level of the DCI format of the to-be-monitored PDCCH, or the monitoring parameter is associated with at least two of the DCI format of a PDCCH to be monitored by the user equipment, a CCE aggregation level of the to-be-monitored PDCCH, and the CCE aggregation level of the DCI format of the to-be-monitored PDCCH; wherein the DCI format comprises at least one of the following: a first DCI format and a second DCI format of a common search space, wherein the first DCI format is used to schedule a physical uplink shared channel of a serving cell, and the second DCI format is used to schedule a physical downlink shared channel of a serving cell; a first DCI format and a second DCI format of a UE-specific search space, wherein the first DCI format is used to schedule a physical uplink shared channel of a serving cell, and the second DCI format is used to schedule a physical downlink shared channel of a serving cell; and a first DCI format, a second DCI format, a third DCI format, and a fourth DCI format, wherein the first DCI format is used to schedule a physical uplink shared channel of a serving cell, the second DCI format is used to schedule a physical downlink shared channel of a serving cell, the third DCI format is used to schedule a physical uplink shared channel of a serving cell, and the fourth DCI format is used to schedule a physical downlink shared channel of a serving cell. a first DCI format and a second DCI format of a common search space, wherein the first DCI format is used to schedule a physical uplink shared channel of a serving cell, and the second DCI format is used to schedule a physical downlink shared channel of a serving cell; a first DCI format and a second DCI format of a UE-specific search space, wherein the first DCI format is used to schedule a physical uplink shared channel of a serving cell, and the second DCI format is used to schedule a physical downlink shared channel of a serving cell; and a first DCI format, a second DCI format, a third DCI format, and a fourth DCI format, wherein the first DCI format is used to schedule a physical uplink shared channel of a serving cell, the second DCI format is used to schedule a physical downlink shared channel of a serving cell, the third DCI format is used to schedule a physical uplink shared channel of a serving cell, and the fourth DCI format is used to schedule a physical downlink shared channel of a serving cell.