A message processing method, applied to a control-plane device, comprising: receiving a first message containing at least one type of private-format data sent by an authentication and authorization server; determining identification information of a target device according to the first message and selecting a message parsing plug-in that matches the determined identification information of the target device; and sending the first message to the selected message parsing plug-in and receiving parsed data from the selected message parsing plug-in, wherein the parsed data is data obtained after the selected message parsing plug-in parses the at least one type of private-format data in the first message, the target device is a forwarding-plane device, and the identification information of the target device is used for identifying the target device; and determining, according to the parsed data, a manner in which the target device processes a second message used for accessing a website; wherein the method further comprises: receiving identification information reported by a plurality of target devices and identification information reported by a plurality of message parsing plug-ins; and establishing a correspondence between the identification information of the plurality of target devices and the identification information of the plurality of message parsing plug-ins according to the identification information reported by the plurality of target devices and the identification information reported by the plurality of message parsing plug-ins; selecting the message parsing plug-in that matches the determined identification information of the target device comprising: selecting, according to the correspondence, the message parsing plug-in that matches the determined identification information of the target device. receiving a first message containing at least one type of private-format data sent by an authentication and authorization server; determining identification information of a target device according to the first message and selecting a message parsing plug-in that matches the determined identification information of the target device; and sending the first message to the selected message parsing plug-in and receiving parsed data from the selected message parsing plug-in, wherein the parsed data is data obtained after the selected message parsing plug-in parses the at least one type of private-format data in the first message, the target device is a forwarding-plane device, and the identification information of the target device is used for identifying the target device; and determining, according to the parsed data, a manner in which the target device processes a second message used for accessing a website; wherein the method further comprises: receiving identification information reported by a plurality of target devices and identification information reported by a plurality of message parsing plug-ins; and establishing a correspondence between the identification information of the plurality of target devices and the identification information of the plurality of message parsing plug-ins according to the identification information reported by the plurality of target devices and the identification information reported by the plurality of message parsing plug-ins; selecting the message parsing plug-in that matches the determined identification information of the target device comprising: selecting, according to the correspondence, the message parsing plug-in that matches the determined identification information of the target device. receiving identification information reported by a plurality of target devices and identification information reported by a plurality of message parsing plug-ins; and establishing a correspondence between the identification information of the plurality of target devices and the identification information of the plurality of message parsing plug-ins according to the identification information reported by the plurality of target devices and the identification information reported by the plurality of message parsing plug-ins; selecting the message parsing plug-in that matches the determined identification information of the target device comprising: selecting, according to the correspondence, the message parsing plug-in that matches the determined identification information of the target device.