The invention relates to a WiFi mobile phone face recognition APP attendance machine and an attendance method thereof. The method comprises the following steps: adding attendance APPs in mobile phones, wherein facial feature comparison sample plates of attendance persons are stored in the APPs of the respective mobile phones respectively; storing facial feature IDs given out by the attendance machine in the attendance APPs; binding the ID and facial feature ID of the respective mobile phones of the attendance persons into the attendance machine by the attendance machine; during attendance, operating the attendance APPs in an attendance WiFi coverage area by the attendance persons, and sending attendance requests to the attendance machine; after the commands are sent by the attendance machine, inputting the facial and fingerprint features of the attendance persons by the attendance persons so as to be compared with the sample plates; if the facial and fingerprint features of the attendance persons accord with the sample plates, sending the feature IDs with successful comparison to the attendance machine by the APPs; and replying attendance success messages to corresponding mobile phones by the attendance machine. Face recognition attendance can be realized by hundreds of persons simultaneously, and attendance can be completed in one area after the attendance machine is connected in a WiFi mode, so that the attendance efficiency is improved, and a congestion phenomenon is avoided.