Method, mobile terminal and system for preventing cheated attendance

The invention provides a method, mobile terminal and system for preventing cheated attendance so that the substitutive sign-in probability of an attendance system of the mobile terminal can be lowered and accuracy of the attendance system can be improved to the maximum extent. The method includes the steps that an attendance server issues an attendance request to the mobile terminal which is the mobile terminal held by a person who needs to sign in; the mobile terminal responds to the attendance request; the mobile terminal uploads important privacy information belonging to the person needing to sign in to the attendance server so that attendance can be completed. Attendance can not be completed until the important privacy information belonging to the person needing to sign in is uploaded to the attendance server, the important privacy information belonging to the person needing to sign in is generally not shared with others or the risk needs to be weighed when the important privacy information is shared with others, and therefore by means of the technical scheme, the substitutive sign-in probability of the attendance system of the mobile terminal is lowered to the maximum extent, and accuracy of the attendance system is improved.