A method for user equipment, UE, capability negotiation, comprising: reporting , by a UE to a network, individual capabilities of the UE for respective radio access networks in multiple systems and a merged capability of the UE for all radio access networks in the multiple systems, wherein the merged capability comprises: band combinations supportable by the UE for the respective radio access networks in the multiple systems and a capability parameter corresponding to each band, and the multiple systems comprise a new radio, NR, communication system, wherein the capability parameter comprises a multiple input multiple output, MIMO, parameter, wherein the method further comprises: receiving, by the UE, a radio parameter sent from a master base station; wherein the radio parameter is a radio parameter of a secondary link configured by a secondary base station based on capability indicating information recommended by the master base station, and the radio parameter from the secondary base station is forwarded to the UE via the master base station; wherein the capability indicating information is recommended to the secondary base station by the master base station based on at least one of the merged capability of the UE for all the radio access networks in the multiple systems reported by the UE, a radio network condition of the master base station and a radio resource management strategy of the master base station; and wherein when recommending the capability indicating information to the secondary base station, the master base station forwards, to the secondary base station, an individual capability of the UE for a radio access network to which the secondary base station belongs, the individual capability of the UE for the radio access network to which the secondary base station belongs being reported by the UE. reporting , by a UE to a network, individual capabilities of the UE for respective radio access networks in multiple systems and a merged capability of the UE for all radio access networks in the multiple systems, wherein the merged capability comprises: band combinations supportable by the UE for the respective radio access networks in the multiple systems and a capability parameter corresponding to each band, and the multiple systems comprise a new radio, NR, communication system, wherein the capability parameter comprises a multiple input multiple output, MIMO, parameter, wherein the method further comprises: receiving, by the UE, a radio parameter sent from a master base station; wherein the radio parameter is a radio parameter of a secondary link configured by a secondary base station based on capability indicating information recommended by the master base station, and the radio parameter from the secondary base station is forwarded to the UE via the master base station; wherein the capability indicating information is recommended to the secondary base station by the master base station based on at least one of the merged capability of the UE for all the radio access networks in the multiple systems reported by the UE, a radio network condition of the master base station and a radio resource management strategy of the master base station; and wherein when recommending the capability indicating information to the secondary base station, the master base station forwards, to the secondary base station, an individual capability of the UE for a radio access network to which the secondary base station belongs, the individual capability of the UE for the radio access network to which the secondary base station belongs being reported by the UE. <EOS>