Method, mobile terminal, and system for preventing remote sign-in

The present invention provides a method, a mobile terminal, and a system for preventing remote sign-in, to minimize a remote sign-in probability of a mobile terminal attendance system, and increase accuracy of the attendance system. The method comprises: initiating, by an attendance server, an attendance request to a mobile terminal, wherein the mobile terminal is the mobile terminal possessed by attendance staff; answering, by the mobile terminal, the attendance request; obtaining, by the mobile terminal, a password temporarily assigned by an attendance administrator; and uploading, by the mobile terminal, the obtained password temporarily assigned by the attendance administrator to the attendance server, to complete attendance. Since remote sign-in requires local password information, such local password information is displayed by temporarily releasing by the attendance administrator, and the attendance administrator can readily alter the local password information. Therefore, according to the technical solution provided by the present invention, remote sign-in of the mobile terminal can be effectively prevented, and accuracy of the attendance system can be increased.