A method of determining a search space of a carrier, applied to a terminal, comprising: in a case that cross-carrier scheduling is configured, determining, according to a search space of a scheduling carrier configured by a network device and a scaling factor, a search space of a carrier other than the scheduling carrier, wherein the carrier is a scheduled carrier, wherein determining the search space of the carrier other than the scheduling carrier comprises: determining, according to the search space configured by the network device for the scheduling carrier and the scaling factor, the search space of the scheduled carrier; wherein the determining, according to the search space configured by the network device for the scheduling carrier and the scaling factor, the search space of the scheduled carrier further comprises: determining, according to the quantity of candidate physical downlink control channels, PDCCH, comprised in each aggregation level of the scheduling carrier and the scaling factor, the quantity of candidate PDCCHs comprised in each aggregation level of the search space of the scheduled carrier; and determining, according to the quantity of candidate PDCCHs comprised in each aggregation level of the search space of the scheduled carrier, the search space of the scheduled carrier, wherein the scaling factor is determined based on PDCCH monitoring capabilities of the terminal on different subcarriers and a proportional relationship between subcarrier spacings of the scheduling carrier and the scheduled carrier, or, the scaling factor is determined based on PDCCH monitoring capabilities of the terminal on different subcarriers. in a case that cross-carrier scheduling is configured, determining, according to a search space of a scheduling carrier configured by a network device and a scaling factor, a search space of a carrier other than the scheduling carrier, wherein the carrier is a scheduled carrier, wherein determining the search space of the carrier other than the scheduling carrier comprises: determining, according to the search space configured by the network device for the scheduling carrier and the scaling factor, the search space of the scheduled carrier; wherein the determining, according to the search space configured by the network device for the scheduling carrier and the scaling factor, the search space of the scheduled carrier further comprises: determining, according to the quantity of candidate physical downlink control channels, PDCCH, comprised in each aggregation level of the scheduling carrier and the scaling factor, the quantity of candidate PDCCHs comprised in each aggregation level of the search space of the scheduled carrier; and determining, according to the quantity of candidate PDCCHs comprised in each aggregation level of the search space of the scheduled carrier, the search space of the scheduled carrier, wherein the scaling factor is determined based on PDCCH monitoring capabilities of the terminal on different subcarriers and a proportional relationship between subcarrier spacings of the scheduling carrier and the scheduled carrier, or, the scaling factor is determined based on PDCCH monitoring capabilities of the terminal on different subcarriers. determining, according to the search space configured by the network device for the scheduling carrier and the scaling factor, the search space of the scheduled carrier; wherein the determining, according to the search space configured by the network device for the scheduling carrier and the scaling factor, the search space of the scheduled carrier further comprises: determining, according to the quantity of candidate physical downlink control channels, PDCCH, comprised in each aggregation level of the scheduling carrier and the scaling factor, the quantity of candidate PDCCHs comprised in each aggregation level of the search space of the scheduled carrier; and determining, according to the quantity of candidate PDCCHs comprised in each aggregation level of the search space of the scheduled carrier, the search space of the scheduled carrier, wherein the scaling factor is determined based on PDCCH monitoring capabilities of the terminal on different subcarriers and a proportional relationship between subcarrier spacings of the scheduling carrier and the scheduled carrier, or, the scaling factor is determined based on PDCCH monitoring capabilities of the terminal on different subcarriers. determining, according to the quantity of candidate physical downlink control channels, PDCCH, comprised in each aggregation level of the scheduling carrier and the scaling factor, the quantity of candidate PDCCHs comprised in each aggregation level of the search space of the scheduled carrier; and determining, according to the quantity of candidate PDCCHs comprised in each aggregation level of the search space of the scheduled carrier, the search space of the scheduled carrier, wherein the scaling factor is determined based on PDCCH monitoring capabilities of the terminal on different subcarriers and a proportional relationship between subcarrier spacings of the scheduling carrier and the scheduled carrier, or, the scaling factor is determined based on PDCCH monitoring capabilities of the terminal on different subcarriers.