A method for determining a quasi-co-location reference signal set, comprising: determining one control resource set, CORESET, with a lowest index among CORESETs of one CORESET group, wherein the CORESETs are comprised in a latest time unit of a data channel or a Channel State Information - Reference Signal, CSI-RS, resource which comprises at least one CORESET in the one CORESET group, and the latest time unit is a time unit closest to the data channel or the CSI-RS resource among time units comprising at least one CORESET of the one CORESET group; and determining one quasi-co-location reference signal set of one port group according to a quasi-co-location reference signal set of demodulation reference signals of the determined CORESET; wherein the one port group satisfies at least one of following features: the one port group being one demodulation reference signal, DMRS, port group corresponding to the data channel, and a time interval between the data channel and control signaling scheduling the data channel being less than a predefined threshold; or the one port group being one Channel state information-reference signal, CSI-RS, port group corresponding to the CSI-RS resource, and a time interval between the CSI-RS resource and control signaling scheduling the measurement reference resource being less than a predefined threshold; wherein the CORESETs of the one CORESET group comprised in the latest time unit are CORESETs of the one CORESET group associated with at least one search space set to be monitored in the latest time unit, wherein the one CORESET group comprises a CORESET in which control information scheduling the data channel or the CSI-RS resource is located, the one CORESET group is one of M CORESET groups and the one port group is one of M port groups, wherein M is larger than 1, and each of the M port groups corresponds to one of the M CORESET groups and the M port groups are in one BWP bandwidth part. determining one control resource set, CORESET, with a lowest index among CORESETs of one CORESET group, wherein the CORESETs are comprised in a latest time unit of a data channel or a Channel State Information - Reference Signal, CSI-RS, resource which comprises at least one CORESET in the one CORESET group, and the latest time unit is a time unit closest to the data channel or the CSI-RS resource among time units comprising at least one CORESET of the one CORESET group; and determining one quasi-co-location reference signal set of one port group according to a quasi-co-location reference signal set of demodulation reference signals of the determined CORESET; wherein the one port group satisfies at least one of following features: the one port group being one demodulation reference signal, DMRS, port group corresponding to the data channel, and a time interval between the data channel and control signaling scheduling the data channel being less than a predefined threshold; or the one port group being one Channel state information-reference signal, CSI-RS, port group corresponding to the CSI-RS resource, and a time interval between the CSI-RS resource and control signaling scheduling the measurement reference resource being less than a predefined threshold; wherein the CORESETs of the one CORESET group comprised in the latest time unit are CORESETs of the one CORESET group associated with at least one search space set to be monitored in the latest time unit, wherein the one CORESET group comprises a CORESET in which control information scheduling the data channel or the CSI-RS resource is located, the one CORESET group is one of M CORESET groups and the one port group is one of M port groups, wherein M is larger than 1, and each of the M port groups corresponds to one of the M CORESET groups and the M port groups are in one BWP bandwidth part. the one port group being one demodulation reference signal, DMRS, port group corresponding to the data channel, and a time interval between the data channel and control signaling scheduling the data channel being less than a predefined threshold; or the one port group being one Channel state information-reference signal, CSI-RS, port group corresponding to the CSI-RS resource, and a time interval between the CSI-RS resource and control signaling scheduling the measurement reference resource being less than a predefined threshold; wherein the CORESETs of the one CORESET group comprised in the latest time unit are CORESETs of the one CORESET group associated with at least one search space set to be monitored in the latest time unit, wherein the one CORESET group comprises a CORESET in which control information scheduling the data channel or the CSI-RS resource is located, the one CORESET group is one of M CORESET groups and the one port group is one of M port groups, wherein M is larger than 1, and each of the M port groups corresponds to one of the M CORESET groups and the M port groups are in one BWP bandwidth part.