A method, system, and device for reporting User Agent Profile (UAP) information are disclosed. In the embodiments of the invention, UAP information is associated with an attribute group label, and a client identifies the attribute group label and reports UAP attribute information associated with the identified attribute group label to a server side according to the identified attribute group label, thereby avoiding reporting all UAP attribute information and further saving network resources. Moreover, in the case that a change occurs in the value of a device capability UAP attribute of a terminal or in the attribute group label of the server side, if such a change affects an existing service, the client only needs to send the changed device capability UAP information to the server side, thereby further avoiding transmitting a large volume of UAP information and further saving the network resources.