An information processing device includes an external information detection unit (141) that detects an object that is present outside a moving body based on data detected by an external detection unit, an internal information detection unit (142) that detects a direction of a driver's face inside the moving body based on data detected by an internal detection unit, a determination unit (155) that determines whether a position of the object detected by the external information detection unit (141) and the direction of the driver's face detected by the internal information detection unit (142) are in a same direction, and an output control unit (105) that outputs an alert to a driver more strongly when the position of the object is not in the same direction as the direction of the driver's face, as compared to a case where the position of the object is in the same direction as the direction of the driver's face.