A method for monitoring a Wake-Up Signal, WUS, comprising: determining, by a terminal device, a WUS monitoring occasion according to configuration information sent by a network device; wherein the configuration information comprises a WUS monitoring occasion parameter, wherein determining, by the terminal device, the WUS monitoring occasion according to the configuration information sent by the network device comprises: determining, by the terminal device, that all WUS-specific PDCCH transmission occasions between a maximum time offset and a minimum time offset in WUS-specific PDCCH search spaces configured on a currently activated downlink BWP are WUS monitoring occasions; wherein the maximum time offset comprises a maximum time offset between the WUS monitoring occasion and a starting time of a Discontinuous Reception, DRX-onDurationTimer, and the minimum time offset comprises a minimum time offset between the WUS monitoring occasion and the starting time of the DRX-onDurationTimer, wherein the configuration of the maximum time offset and the minimum time offset is included in the configuration information sent by the network device; the WUS monitoring occasions are located before the starting time of the DRX-onDurationTimer. determining, by a terminal device, a WUS monitoring occasion according to configuration information sent by a network device; wherein the configuration information comprises a WUS monitoring occasion parameter, wherein determining, by the terminal device, the WUS monitoring occasion according to the configuration information sent by the network device comprises: determining, by the terminal device, that all WUS-specific PDCCH transmission occasions between a maximum time offset and a minimum time offset in WUS-specific PDCCH search spaces configured on a currently activated downlink BWP are WUS monitoring occasions; wherein the maximum time offset comprises a maximum time offset between the WUS monitoring occasion and a starting time of a Discontinuous Reception, DRX-onDurationTimer, and the minimum time offset comprises a minimum time offset between the WUS monitoring occasion and the starting time of the DRX-onDurationTimer, wherein the configuration of the maximum time offset and the minimum time offset is included in the configuration information sent by the network device; the WUS monitoring occasions are located before the starting time of the DRX-onDurationTimer. determining, by the terminal device, that all WUS-specific PDCCH transmission occasions between a maximum time offset and a minimum time offset in WUS-specific PDCCH search spaces configured on a currently activated downlink BWP are WUS monitoring occasions; wherein the maximum time offset comprises a maximum time offset between the WUS monitoring occasion and a starting time of a Discontinuous Reception, DRX-onDurationTimer, and the minimum time offset comprises a minimum time offset between the WUS monitoring occasion and the starting time of the DRX-onDurationTimer, wherein the configuration of the maximum time offset and the minimum time offset is included in the configuration information sent by the network device; the WUS monitoring occasions are located before the starting time of the DRX-onDurationTimer.