An electronic device that is configured to communicate with a relay device and to transmit electronic data to a server, the relay device being a user terminal including a display unit that displays a message to a user according to communication with said electronic device, said electronic device comprising: a first power supply unit configured to supply power; a control unit configured to receive the power from said first power supply unit and controls said electronic device; a generation unit configured to receive the power from said first power supply unit and generate the electronic data by processing performed by said electronic device during the reception of the power from said first power supply unit; and a first storage unit (174,33) that includes a region in which the generated electronic data is stored; an antenna unit configured to receive radio waves emitted from the relay device; a second power supply unit that is different from said first power supply unit and is configured to generate power from electromagnetic induction caused by the radio waves received by said antenna unit; a near field wireless communication unit (171,108) configured to receive the power from said second power supply unit, and communicate with the relay device via said antenna unit by using near field wireless communication and communicate with said control unit; and a second storage unit that is a non-volatile memory including a region in which existence identification information is stored, the existence identification information indicating whether or not the electronic data which is to be read from the relay device is stored in said first storage unit, wherein said first storage unit (174,33) is configured to (i) receive the power from said first power supply unit without receiving the power from said second power supply unit, and said first storage unit (174, 33) is configured (ii) to be accessed by said control unit and accessed by the relay device via said near field wireless communication unit (171, 108), said second storage unit is configured to be accessed bv the relay device via said near field wireless communication unit (171,108) by receiving the power from said second power supply unit, and said second storage unit is configured to be accessed by said control unit by receiving the power from said first power supply unit, and said near field wireless communication unit (171,108) is configured to read the existence identification information which is stored in said second storage unit, and transmit the existence identification information to the relay device. a first power supply unit configured to supply power; a control unit configured to receive the power from said first power supply unit and controls said electronic device; a generation unit configured to receive the power from said first power supply unit and generate the electronic data by processing performed by said electronic device during the reception of the power from said first power supply unit; and a first storage unit (174,33) that includes a region in which the generated electronic data is stored; an antenna unit configured to receive radio waves emitted from the relay device; a second power supply unit that is different from said first power supply unit and is configured to generate power from electromagnetic induction caused by the radio waves received by said antenna unit; a near field wireless communication unit (171,108) configured to receive the power from said second power supply unit, and communicate with the relay device via said antenna unit by using near field wireless communication and communicate with said control unit; and a second storage unit that is a non-volatile memory including a region in which existence identification information is stored, the existence identification information indicating whether or not the electronic data which is to be read from the relay device is stored in said first storage unit, wherein said first storage unit (174,33) is configured to (i) receive the power from said first power supply unit without receiving the power from said second power supply unit, and said first storage unit (174, 33) is configured (ii) to be accessed by said control unit and accessed by the relay device via said near field wireless communication unit (171, 108), (i) receive the power from said first power supply unit without receiving the power from said second power supply unit, and said first storage unit (174, 33) is configured (ii) to be accessed by said control unit and accessed by the relay device via said near field wireless communication unit (171, 108), said second storage unit is configured to be accessed bv the relay device via said near field wireless communication unit (171,108) by receiving the power from said second power supply unit, and said second storage unit is configured to be accessed by said control unit by receiving the power from said first power supply unit, and said near field wireless communication unit (171,108) is configured to read the existence identification information which is stored in said second storage unit, and transmit the existence identification information to the relay device.