A method of carrier configuration, being applicable to a base station, comprising: determining a target carrier, wherein the target carrier is a carrier on which a terminal is instructed to perform a target operation, and the target operation comprises an activation operation or a deactivation operation; sending target information to the terminal for the terminal to perform the target operation on the target carrier after the terminal determines the target carrier according to the target information, wherein the target information is physical layer information and at least indicates carrier information corresponding to the target carrier; receiving traffic transmission demand information reported by the terminal, wherein the traffic transmission demand information comprises carrier information corresponding to one or more first candidate carriers which the terminal instructs to activate or deactivate; and wherein determining the target carrier comprises: taking all or part of the one or more first candidate carriers as the target carrier, wherein the target information is downlink control information, characterized in that sending the target information to the terminal comprises: sending the downlink control information to the terminal after a preset information field in the downlink control information carries the target information, wherein the preset information field is obtained by additionally providing an information field to the current downlink control information, wherein the preset information field has a variable length and a length of the preset information field is determined according to the number of carriers previously configured for the terminal. determining a target carrier, wherein the target carrier is a carrier on which a terminal is instructed to perform a target operation, and the target operation comprises an activation operation or a deactivation operation; sending target information to the terminal for the terminal to perform the target operation on the target carrier after the terminal determines the target carrier according to the target information, wherein the target information is physical layer information and at least indicates carrier information corresponding to the target carrier; receiving traffic transmission demand information reported by the terminal, wherein the traffic transmission demand information comprises carrier information corresponding to one or more first candidate carriers which the terminal instructs to activate or deactivate; and wherein determining the target carrier comprises: taking all or part of the one or more first candidate carriers as the target carrier, wherein the target information is downlink control information, characterized in that sending the target information to the terminal comprises: sending the downlink control information to the terminal after a preset information field in the downlink control information carries the target information, wherein the preset information field is obtained by additionally providing an information field to the current downlink control information, wherein the preset information field has a variable length and a length of the preset information field is determined according to the number of carriers previously configured for the terminal. taking all or part of the one or more first candidate carriers as the target carrier, wherein the target information is downlink control information, characterized in that sending the target information to the terminal comprises: sending the downlink control information to the terminal after a preset information field in the downlink control information carries the target information, wherein the preset information field is obtained by additionally providing an information field to the current downlink control information, wherein the preset information field has a variable length and a length of the preset information field is determined according to the number of carriers previously configured for the terminal.