An information processing device is equipped with a recognition information acquirer, a danger determiner, a signal generator, and a signal transmitter. The recognition information acquirer acquires, from an electric apparatus, recognition information that is information obtained as a result of recognition of sensor information by the electric apparatus that performs operational control using the sensor information, the sensor information being sensed and output by a sensor. The danger determiner determines whether a danger state exists based on the recognition information acquired by the recognition information acquirer. The signal generator, when the danger determiner determines that the danger state exists, generates an informing signal that causes operation of an informing function of an informing apparatus that informs of danger. The signal transmitter transmits to the informing apparatus the informing signal generated by the signal generator.