A method for selecting an uplink carrier applied in a Long Term Evolution, LTE, licensed Assisted Access, LAA, system, comprising: scheduling , by a network side, at least one unlicensed uplink carrier for a User Equipment, UE, wherein a capability of the network side for scheduling the number of unlicensed uplink carriers for the UE is greater than the number of carriers that is supported by an uplink carrier aggregation capability of the UE, or the capability of the network side for scheduling the number of unlicensed uplink carriers for the UE is less than or equal to the number of carriers that is supported by the uplink carrier aggregation capability of the UE; and notifying the UE of a scheduling parameter of the scheduled unlicensed uplink carrier so that the UE selects a carrier capable of being used for uplink data transmission from notified unlicensed uplink carriers according to the scheduling parameter; wherein the scheduling parameter comprises at least one of a time-frequency resource allocation parameter, frequency-hopping, a modulation and encoding scheme, a redundancy version and a Transmit power Control, TPC, instruction of a Physical Uplink Shared Channel, PUSCH; and wherein if the capability of the network side for scheduling the number of unlicensed uplink carriers for the UE is less than or equal to the number of carriers that is supported by the uplink carrier aggregation capability of the UE and the number of available carriers in the scheduled unlicensed uplink carriers is less than the uplink carrier aggregation capability of the UE, a listening result reported by the UE for other non-scheduled clear carriers that are listened by the UE and a scheduling parameter of the other non-scheduled clear carriers listened by the UE are received by the network side. scheduling , by a network side, at least one unlicensed uplink carrier for a User Equipment, UE, wherein a capability of the network side for scheduling the number of unlicensed uplink carriers for the UE is greater than the number of carriers that is supported by an uplink carrier aggregation capability of the UE, or the capability of the network side for scheduling the number of unlicensed uplink carriers for the UE is less than or equal to the number of carriers that is supported by the uplink carrier aggregation capability of the UE; and notifying the UE of a scheduling parameter of the scheduled unlicensed uplink carrier so that the UE selects a carrier capable of being used for uplink data transmission from notified unlicensed uplink carriers according to the scheduling parameter; wherein the scheduling parameter comprises at least one of a time-frequency resource allocation parameter, frequency-hopping, a modulation and encoding scheme, a redundancy version and a Transmit power Control, TPC, instruction of a Physical Uplink Shared Channel, PUSCH; and wherein if the capability of the network side for scheduling the number of unlicensed uplink carriers for the UE is less than or equal to the number of carriers that is supported by the uplink carrier aggregation capability of the UE and the number of available carriers in the scheduled unlicensed uplink carriers is less than the uplink carrier aggregation capability of the UE, a listening result reported by the UE for other non-scheduled clear carriers that are listened by the UE and a scheduling parameter of the other non-scheduled clear carriers listened by the UE are received by the network side. <EOS>