A method for managing a Secondary Cell, SCell, in Carrier Aggregation, CA, comprising: configuring, by an evolved Node B, eNB, a Primary Cell, PCell, for a User Equipment, UE, further comprising: selecting an inter-frequency adjacent area which is supported by the UE and which has a coverage area which contains the coverage area of the PCell, and configuring the inter-frequency adjacent area as an SCell for the UE; selecting an SCell for the UE from a remaining inter-frequency adjacent area of the PCell when a number of the SCell for the UE configured according to the inter-frequency adjacent area cannot meet a bandwidth requirement of the CA wherein the step of selecting an SCell for the UE from a remaining inter-frequency adjacent area of the PCell comprises: reporting, to the eNB by the UE, a measured adjacent cell in the remaining inter-frequency adjacent area of the PCell for the UE, of which a signal quality is higher than a threshold of a measurement event A4 in a 3rd Generation Partnership Project, 3GPP, TS36.331 protocol, and configuring, by the eNB, the measured adjacent area as the SCell for the UE; and setting an initial state of both the SCell for the UE configured according to the inter-frequency adjacent area and the SCell for the UE configured according to the measured adjacent area as deactivation, and activating both the SCell for the UE configured according to the inter-frequency adjacent area and the SCell for the UE configured according to the measured adjacent area when detecting that a service volume of the UE is increased to a pre-set threshold. selecting an inter-frequency adjacent area which is supported by the UE and which has a coverage area which contains the coverage area of the PCell, and configuring the inter-frequency adjacent area as an SCell for the UE; selecting an SCell for the UE from a remaining inter-frequency adjacent area of the PCell when a number of the SCell for the UE configured according to the inter-frequency adjacent area cannot meet a bandwidth requirement of the CA wherein the step of selecting an SCell for the UE from a remaining inter-frequency adjacent area of the PCell comprises: reporting, to the eNB by the UE, a measured adjacent cell in the remaining inter-frequency adjacent area of the PCell for the UE, of which a signal quality is higher than a threshold of a measurement event A4 in a 3rd Generation Partnership Project, 3GPP, TS36.331 protocol, and configuring, by the eNB, the measured adjacent area as the SCell for the UE; and reporting, to the eNB by the UE, a measured adjacent cell in the remaining inter-frequency adjacent area of the PCell for the UE, of which a signal quality is higher than a threshold of a measurement event A4 in a 3rd Generation Partnership Project, 3GPP, TS36.331 protocol, and configuring, by the eNB, the measured adjacent area as the SCell for the UE; and setting an initial state of both the SCell for the UE configured according to the inter-frequency adjacent area and the SCell for the UE configured according to the measured adjacent area as deactivation, and activating both the SCell for the UE configured according to the inter-frequency adjacent area and the SCell for the UE configured according to the measured adjacent area when detecting that a service volume of the UE is increased to a pre-set threshold.