A method for configuring a new quality of service, QoS, architecture in a dual-connectivity system, the method comprising: making, by a first network element, an offloading decision in response to needing to offload a Protocol Data Unit, PDU, session of a User Equipment, LTE, wherein the offloading decision comprises at least an offloading granularity, an offloading object, and an offloading bearer type; and sending, by the first network element, a control plane message to a second network element according to the offloading decision, wherein the control plane message is used for requesting the second network element to perform an admission decision and resource configuration of offloading resources, and the control plane message carries offloading resource information, wherein the offloading resource information comprises: offloading object information and offloading bearer type information, wherein the offloading granularity comprises one of the following: offloading all of quality of service flows, QFs, in the PDU session to the second network element; offloading part of the QFs in the PDU session to the second network element; or offloading part of data packets in all or part of the QFs in the PDU session to the second network element, wherein the offloading object is one of the following: all of QFs in the PDU session; part of the QFs in the PDU session; or part of data packets in all or part of the QFs in the PDU session, wherein the offloading bearer type comprises one or any combination of the following: a secondary cell group, SCG, bearer; an SCG split bearer; or a master cell group, MCG, split bearer. making, by a first network element, an offloading decision in response to needing to offload a Protocol Data Unit, PDU, session of a User Equipment, LTE, wherein the offloading decision comprises at least an offloading granularity, an offloading object, and an offloading bearer type; and sending, by the first network element, a control plane message to a second network element according to the offloading decision, wherein the control plane message is used for requesting the second network element to perform an admission decision and resource configuration of offloading resources, and the control plane message carries offloading resource information, wherein the offloading resource information comprises: offloading object information and offloading bearer type information, wherein the offloading granularity comprises one of the following: offloading all of quality of service flows, QFs, in the PDU session to the second network element; offloading part of the QFs in the PDU session to the second network element; or offloading part of data packets in all or part of the QFs in the PDU session to the second network element, wherein the offloading object is one of the following: all of QFs in the PDU session; part of the QFs in the PDU session; or part of data packets in all or part of the QFs in the PDU session, wherein the offloading bearer type comprises one or any combination of the following: a secondary cell group, SCG, bearer; an SCG split bearer; or a master cell group, MCG, split bearer. offloading all of quality of service flows, QFs, in the PDU session to the second network element; offloading part of the QFs in the PDU session to the second network element; or offloading part of data packets in all or part of the QFs in the PDU session to the second network element, wherein the offloading object is one of the following: all of QFs in the PDU session; part of the QFs in the PDU session; or part of data packets in all or part of the QFs in the PDU session, wherein the offloading bearer type comprises one or any combination of the following: a secondary cell group, SCG, bearer; an SCG split bearer; or a master cell group, MCG, split bearer. all of QFs in the PDU session; part of the QFs in the PDU session; or part of data packets in all or part of the QFs in the PDU session, wherein the offloading bearer type comprises one or any combination of the following: a secondary cell group, SCG, bearer; an SCG split bearer; or a master cell group, MCG, split bearer. a secondary cell group, SCG, bearer; an SCG split bearer; or a master cell group, MCG, split bearer.