A method for receiving downlink control information, DCI, comprising: receiving, by a terminal, Bandwidth Part, BWP, configuration information transmitted by an access network device, the BWP configuration information being used for configuring a target BWP which is located in an unlicensed spectrum and comprises m sub-bands; determining, by the terminal, the m sub-bands located at the target BWP according to the BWP configuration information; characterized in that the method further comprises: monitoring, by the terminal, a target sequence at a first time domain position on all or part of the m sub-bands respectively, wherein the first time domain position is a time-frequency position which is pre-determined by a communication protocol, or the first time domain position is a time domain position which is pre-configured by the access network device during a procedure of configuring the target BWP; and the target sequence is used to identify sub-bands on which Listen Before Talk, LBT, is successful in the m sub-bands, or the target sequence is used to identify sub-bands on which the DCI is transmitted in the m sub-bands; monitoring, by the terminal, DCI on all or part of the m sub-bands after the target sequence is monitored; wherein m is a positive integer greater than 1. receiving, by a terminal, Bandwidth Part, BWP, configuration information transmitted by an access network device, the BWP configuration information being used for configuring a target BWP which is located in an unlicensed spectrum and comprises m sub-bands; determining, by the terminal, the m sub-bands located at the target BWP according to the BWP configuration information; characterized in that the method further comprises: monitoring, by the terminal, a target sequence at a first time domain position on all or part of the m sub-bands respectively, wherein the first time domain position is a time-frequency position which is pre-determined by a communication protocol, or the first time domain position is a time domain position which is pre-configured by the access network device during a procedure of configuring the target BWP; and the target sequence is used to identify sub-bands on which Listen Before Talk, LBT, is successful in the m sub-bands, or the target sequence is used to identify sub-bands on which the DCI is transmitted in the m sub-bands; monitoring, by the terminal, DCI on all or part of the m sub-bands after the target sequence is monitored; wherein m is a positive integer greater than 1. monitoring, by the terminal, a target sequence at a first time domain position on all or part of the m sub-bands respectively, wherein the first time domain position is a time-frequency position which is pre-determined by a communication protocol, or the first time domain position is a time domain position which is pre-configured by the access network device during a procedure of configuring the target BWP; and the target sequence is used to identify sub-bands on which Listen Before Talk, LBT, is successful in the m sub-bands, or the target sequence is used to identify sub-bands on which the DCI is transmitted in the m sub-bands; monitoring, by the terminal, DCI on all or part of the m sub-bands after the target sequence is monitored; wherein m is a positive integer greater than 1.