1. A terminal single sign-on (SSO) configuration method, comprising: establishing a connection between a configuration system and an application service system, wherein the application service system refers to an application program installed on a mobile terminal; receiving in real time, by the configuration system, a user interface for authentication from the application service system; generating, by the configuration system, interface elements corresponding to input controls in the user interface received in real time; sequentially transmitting operation information and login parameters of the interface elements from the configuration system to the application service system; sequentially recording a plurality of operations on the input controls in the user interface according to the operation information and the login parameters of the corresponding interface elements, wherein the plurality of operations completes an authentication process for the application service system; generating a recorded script containing the plurality of operations and the login parameters of the interface elements; associating a VPN (virtual private network) login information with the recorded script; and uploading the VPN login information and the associated recorded script to a server; wherein when the application service system is launched next time on the mobile terminal, the application service system automatically obtains the recorded script associated with the VPN login information from the server, and automatically replays the plurality of operations to complete the authentication process.