A computer-implemented trusted login method applied to a trusted login system comprising a first application system including a first server and a first client terminal and a second application system including a second server and a target client terminal, comprising: issuing, from the first server and to the second server, a current trusted login identifier that certifies the second server to obtain a temporary trusted login token; receiving, at the first server and from the second server, a trusted login token acquisition request (S3.1), the trusted login token acquisition request being based on a trusted login request that i) specifies a service page access request comprising a request to access a service page provided by the first server, and ii) was sent to the second server by the target client terminal, and the current trusted login identifier; generating, by the first server, a temporary trusted login token based on the received token acquisition request and setting a service page access service permission of the temporary trusted login token (S3.2); determining, by the first server, whether the current trusted login identifier is legal or not; in response to determining that the current trusted login identifier is legal, sending, from the first server, the temporary trusted login token to the second server, wherein the second server sends the temporary trusted login token to the target client terminal (S3.3); receiving, at the first server and from the target client terminal, the service page access request (S3.4), wherein the service page access request includes the temporary trusted login token; obtaining, by the first server and from the received service page access request, the temporary trusted login token and determining whether the temporary trusted login token has service permission to access the service page requested to be accessed by the target client terminal (S3.5); if it is determined that the temporary trusted login token has service permission to access the corresponding service page, permitting, by the first server, the target client terminal trusted log in to the first server and returning, from the first server and to the target client terminal, the service page requested to be accessed by the target client terminal (S3.6). issuing, from the first server and to the second server, a current trusted login identifier that certifies the second server to obtain a temporary trusted login token; receiving, at the first server and from the second server, a trusted login token acquisition request (S3.1), the trusted login token acquisition request being based on a trusted login request that i) specifies a service page access request comprising a request to access a service page provided by the first server, and ii) was sent to the second server by the target client terminal, and the current trusted login identifier; generating, by the first server, a temporary trusted login token based on the received token acquisition request and setting a service page access service permission of the temporary trusted login token (S3.2); determining, by the first server, whether the current trusted login identifier is legal or not; in response to determining that the current trusted login identifier is legal, sending, from the first server, the temporary trusted login token to the second server, wherein the second server sends the temporary trusted login token to the target client terminal (S3.3); receiving, at the first server and from the target client terminal, the service page access request (S3.4), wherein the service page access request includes the temporary trusted login token; obtaining, by the first server and from the received service page access request, the temporary trusted login token and determining whether the temporary trusted login token has service permission to access the service page requested to be accessed by the target client terminal (S3.5); if it is determined that the temporary trusted login token has service permission to access the corresponding service page, permitting, by the first server, the target client terminal trusted log in to the first server and returning, from the first server and to the target client terminal, the service page requested to be accessed by the target client terminal (S3.6).