Attendance checking method, system and device based on two-dimensional bar code

The invention discloses an attendance checking method, system and device based on a two-dimensional bar code. The system comprises a mobile terminal, an attendance checking terminal and an attendance checking server, wherein the mobile terminal comprises a display device; the attendance checking terminal comprises an image input device and a network connection device; the attendance checking terminal is connected with the attendance checking server by a network. The method comprises the steps that the mobile terminal converts personal characteristic information to a two-dimensional bar code picture; then the mobile terminal displays the two-dimensional bar code picture on the display device; the attendance checking terminal acquires the two-dimensional bar code picture; then the attendance checking terminal extracts the personal characteristic information from the two-dimensional bar code picture; then the attendance checking terminal sends the personal characteristic information and the attendance checking content to the attendance checking server; the attendance checking server generates an attendance checking record according to the personal characteristic information and the attendance checking content and stores the attendance checking record. The brand new attendance checking technology achieved by adopting the two-dimensional bar code technology can be widely applied to attendance checking of students and enterprise employees. Attendance checking is achieved by utilizing existing hardware via software programs, thus reducing the hardware expenditure of the attendance checking equipment.