A bearer configuration method for radio resource control, RRC, connection reestablishment, wherein the RRC connection reestablishment comprises reestablishment from an eLTE network to an LTE network or NR network or eLTE network, and wherein the eLTE network refers to a 5G core network accessed via an LTE air interface, the method being performed by a terminal (11; 400), being characterized by the method comprising: determining a Packet Data Convergence Protocol, PDCP, type for performing PDCP configuration for a signaling radio bearer1, SRB1, for sending an RRC reestablishment complete message, prior to sending the RRC reestablishment complete message, wherein the PDCP type comprises LTE PDCP supporting an LTE network or NR PDCP supporting an NR network or an eLTE network; and sending the RRC reestablishment complete message to a network device (12; 700) based on the PDCP type for performing the PDCP configuration, wherein the determining the PDCP type for performing PDCP configuration for the SRB 1 for sending the RRC reestablishment complete message comprises: determining, when the terminal (11; 400) detecting that a PDCP type supported by a target access network is not the NR PDCP, or when the terminal (11; 400) access times out, that the PDCP type for performing the PDCP configuration for the SRB1 for sending the RRC reestablishment complete message falls back to the LTE PDCP; or determining, when the terminal (11; 400) detecting that a PDCP type supported by a target network to be accessed is the NR PDCP, that the PDCP type for performing the PDCP configuration for the SRB 1 for sending the RRC reestablishment complete message is the NR PDCP. determining a Packet Data Convergence Protocol, PDCP, type for performing PDCP configuration for a signaling radio bearer1, SRB1, for sending an RRC reestablishment complete message, prior to sending the RRC reestablishment complete message, wherein the PDCP type comprises LTE PDCP supporting an LTE network or NR PDCP supporting an NR network or an eLTE network; and sending the RRC reestablishment complete message to a network device (12; 700) based on the PDCP type for performing the PDCP configuration, wherein the determining the PDCP type for performing PDCP configuration for the SRB 1 for sending the RRC reestablishment complete message comprises: determining, when the terminal (11; 400) detecting that a PDCP type supported by a target access network is not the NR PDCP, or when the terminal (11; 400) access times out, that the PDCP type for performing the PDCP configuration for the SRB1 for sending the RRC reestablishment complete message falls back to the LTE PDCP; or determining, when the terminal (11; 400) detecting that a PDCP type supported by a target network to be accessed is the NR PDCP, that the PDCP type for performing the PDCP configuration for the SRB 1 for sending the RRC reestablishment complete message is the NR PDCP. determining, when the terminal (11; 400) detecting that a PDCP type supported by a target access network is not the NR PDCP, or when the terminal (11; 400) access times out, that the PDCP type for performing the PDCP configuration for the SRB1 for sending the RRC reestablishment complete message falls back to the LTE PDCP; or determining, when the terminal (11; 400) detecting that a PDCP type supported by a target network to be accessed is the NR PDCP, that the PDCP type for performing the PDCP configuration for the SRB 1 for sending the RRC reestablishment complete message is the NR PDCP. <EOS>