The invention discloses a social log-in method. The social log-in method comprises the following steps that: a, third-party service in a terminal can be used for generating an agent log-in address according to a platform identifier of an
open platform selected by a user, the identifier of the third-party service and a token
callback address provided by the third-party service, and can be used for loading the agent log-in address by the terminal; b, a social log-in servicer can be used for generating a URI (
Uniform Resource Identifier) address of a user log-in authoritative page of the
open platform according to the identifier of the third-party service and the platform identifier in log-in requests, and used for re-orientating the terminal to the URI address; c, the terminal is used for receiving identity information input by the user, authorizing the third-party service and feeding back the identity information of the user and the third-party service
authorization to the
open platform; d, after the user passes the validation, the third-party service in the terminal is used for acquiring the
user information of the user from the corresponding open platform by virtue of the social log-in
server; and e, the third-party service in the terminal is used for re-orientating the user to a user logged interface according to the
user information processing and the open platform but joint. The social log-in method, the social log-in
system and the social log-in device can be used for lowering the third-party
service development and maintenance cost, and can be used for improving the efficiency while being convenient to use.