A mobile information processing device (200) obtains specific information of a user in response to an operation by the user, authenticates the user based on the specific information, establishes the first wireless communication mode, and then transmits authentication information to an information processing terminal. The information processing terminal (100) receives the authentication information from the mobile information processing device in the first wireless communication mode (A), verifies the received authentication information, generates an identification based on the resultant verification, transmits, in the first wireless communication mode, the identification to the mobile information processing device, then changes from the first wireless communication mode into the second wireless communication mode (B), and iteratively performs polling of the mobile information processing device. The mobile information processing device receives the identification from the information processing terminal in the first wireless communication mode, then changes from the first wireless communication mode to the second wireless communication mode, and transmits, in response to the polling from the information processing terminal, a reply containing the identification back to the information processing terminal in the second wireless communication mode. Thus the presence of the mobile information processing device is managed.