An application login method, applied to an authentication server, comprising: receiving a login request from a client application, wherein the login request comprises authorization request information of the client application and user home country/region identification information of the client application, and the authorization request information is used to obtain login authentication from the authentication server, wherein the authentication server is an authentication server in a region determined based on the initially configured address information of the application server of the client application, and the region in which the authentication server is located is inconsistent with the user home country/region; after completing the login authentication on the client application by using the authorization request information in the login request, generating, based on the login request, authorization information used to respond to the authorization request information and access information, confirmed based on the user home country/region identification information, of an application server in a user home country/region of the client application, wherein the generation of the access information involves determining the user home country/region of the client application based on the user home country/region identification information, determining address information of the application server in the user home country/region of the client application based on a locally configured correspondence between a home country/region and an application server address, and generating the access information including the address information of the application server; and sending the authorization information and the access information. receiving a login request from a client application, wherein the login request comprises authorization request information of the client application and user home country/region identification information of the client application, and the authorization request information is used to obtain login authentication from the authentication server, wherein the authentication server is an authentication server in a region determined based on the initially configured address information of the application server of the client application, and the region in which the authentication server is located is inconsistent with the user home country/region; after completing the login authentication on the client application by using the authorization request information in the login request, generating, based on the login request, authorization information used to respond to the authorization request information and access information, confirmed based on the user home country/region identification information, of an application server in a user home country/region of the client application, wherein the generation of the access information involves determining the user home country/region of the client application based on the user home country/region identification information, determining address information of the application server in the user home country/region of the client application based on a locally configured correspondence between a home country/region and an application server address, and generating the access information including the address information of the application server; and sending the authorization information and the access information.