A carrier configuration method, comprising: configuring a carrier aggregation model for a user equipment, UE, so that the UE performs data transmission with a network device according to the carrier aggregation model, wherein the carrier aggregation model comprises multiple component carriers, the multiple component carriers comprise at least one core carrier, and the at least one core carrier comprises at least one primary core carrier; the core carrier has an uplink transmission function and a downlink transmission function, the uplink transmission function comprises at least one of the following: an uplink feedback function corresponding to downlink data, a downlink channel state feedback function, or an uplink data transmission function, and the downlink transmission function comprises at least one of the following: a downlink feedback function corresponding to uplink data, an uplink channel state feedback function, or a downlink data transmission function; and the primary core carrier has at least one of the following functions: a system message bearing function, a paging message bearing function, a semi-static scheduling parameter configuration function, a camping reference function, or an encryption reference function, wherein when the multiple component carriers comprise at least two core carriers, after the configuring a carrier aggregation model for the UE, the method further comprises: receiving a notification that a secondary core carrier is changed into a new primary core carrier, wherein the secondary core carrier is a core carrier other than the primary core carrier among the at least two core carriers. configuring a carrier aggregation model for a user equipment, UE, so that the UE performs data transmission with a network device according to the carrier aggregation model, wherein the carrier aggregation model comprises multiple component carriers, the multiple component carriers comprise at least one core carrier, and the at least one core carrier comprises at least one primary core carrier; the core carrier has an uplink transmission function and a downlink transmission function, the uplink transmission function comprises at least one of the following: an uplink feedback function corresponding to downlink data, a downlink channel state feedback function, or an uplink data transmission function, and the downlink transmission function comprises at least one of the following: a downlink feedback function corresponding to uplink data, an uplink channel state feedback function, or a downlink data transmission function; and the primary core carrier has at least one of the following functions: a system message bearing function, a paging message bearing function, a semi-static scheduling parameter configuration function, a camping reference function, or an encryption reference function, wherein when the multiple component carriers comprise at least two core carriers, after the configuring a carrier aggregation model for the UE, the method further comprises: receiving a notification that a secondary core carrier is changed into a new primary core carrier, wherein the secondary core carrier is a core carrier other than the primary core carrier among the at least two core carriers.