A data offloading and transmission method, comprising: receiving, by a user equipment, a data offloading indication sent by a base station, wherein the data offloading indication is sent by the base station to the user equipment after a serving access point of a short-range communications network is allocated by using a data offloading configuration process to the user equipment; and performing, by the user equipment, data offloading and transmission by using uplink transmission resources of short-range communications and/or uplink transmission resources of Long Term Evolution according to the data offloading indication; wherein the user equipment performs a multiplexing operation on data transmitted on at least one radio bearer, on which data is transmitted by using the uplink transmission resources of the Long Term Evolution or the short-range communications, without considering and affecting a radio bearer on which data is transmitted by using the uplink transmission resources of the short-range communications or the Long Term Evolution, respectively; and the user equipment updates a respective Bj value of the at least one radio bearer, on which the data is transmitted by using the uplink transmission resources of the Long Term Evolution or the short-range communications, respectively, wherein Bj is used to calculate, when the user equipment performs a first round of the multiplexing operation, an amount of data encapsulated in the radio bearer, on which the data is transmitted by using the uplink transmission resources of the Long Term Evolution or the short-range communications, respectively, and if the transmission of the data on the at least one radio bearer can not be completed by merely using the available uplink transmission resources of the Long Term Evolution or the short-range communications, respectively, the user equipment performs a multiplexing operation when transmitting, by using currently available uplink transmission resources of the Long Term Evolution or the short-range communications, respectively, remaining data on the at least one radio bearer, where the user equipment uses an updated Bj value of the at least one radio bearer when performing the multiplexing operation for the remaining data on the at least one radio bearer, wherein the operation of updating Bj is: during the first round of multiplexing, decreasing the value of Bj according to an actual amount of data encapsulated in the radio bearer that corresponds to Bj and, later, increasing Bj every transmission time interval, TTI, according to speed of a prioritized bitrate, PBR, of the radio bearer, until reaching a pre-configured value, wherein j is a logical channel number that corresponds to the radio bearer. receiving, by a user equipment, a data offloading indication sent by a base station, wherein the data offloading indication is sent by the base station to the user equipment after a serving access point of a short-range communications network is allocated by using a data offloading configuration process to the user equipment; and performing, by the user equipment, data offloading and transmission by using uplink transmission resources of short-range communications and/or uplink transmission resources of Long Term Evolution according to the data offloading indication; wherein the user equipment performs a multiplexing operation on data transmitted on at least one radio bearer, on which data is transmitted by using the uplink transmission resources of the Long Term Evolution or the short-range communications, without considering and affecting a radio bearer on which data is transmitted by using the uplink transmission resources of the short-range communications or the Long Term Evolution, respectively; and the user equipment updates a respective Bj value of the at least one radio bearer, on which the data is transmitted by using the uplink transmission resources of the Long Term Evolution or the short-range communications, respectively, wherein Bj is used to calculate, when the user equipment performs a first round of the multiplexing operation, an amount of data encapsulated in the radio bearer, on which the data is transmitted by using the uplink transmission resources of the Long Term Evolution or the short-range communications, respectively, and if the transmission of the data on the at least one radio bearer can not be completed by merely using the available uplink transmission resources of the Long Term Evolution or the short-range communications, respectively, the user equipment performs a multiplexing operation when transmitting, by using currently available uplink transmission resources of the Long Term Evolution or the short-range communications, respectively, remaining data on the at least one radio bearer, where the user equipment uses an updated Bj value of the at least one radio bearer when performing the multiplexing operation for the remaining data on the at least one radio bearer, wherein the operation of updating Bj is: during the first round of multiplexing, decreasing the value of Bj according to an actual amount of data encapsulated in the radio bearer that corresponds to Bj and, later, increasing Bj every transmission time interval, TTI, according to speed of a prioritized bitrate, PBR, of the radio bearer, until reaching a pre-configured value, wherein j is a logical channel number that corresponds to the radio bearer.