The utility model discloses an attendance data obtaining device and an information processing system. The attendance data obtaining device comprises a first terminal, at least one second terminal and a central processor. The first terminal is fixed to a preset target position and sends drive signals. The drive signals comprise first identification information of the first terminal and sending time of the drive signals. The second terminals are respectively connected with the first terminal, and send second identification information, flag bit contents and received drive signals of the second terminals after the second terminals receive the drive signals sent by the first terminal. First flat bit contents of the flag bit contents of the second terminals are changed to be second identification contents by the first terminal after the second terminals receive the drive signals. The central processor is respectively connected with each second terminal, integrates the second identification information, the flag bit contents and the drive signals carrying the first identification information and sending time which are sent by the second terminals, and generate attendance data of the second terminals in a corresponding target attendance area in the target position.