An information processing device comprising: a communicator for communicating with a vehicle and a mobile device operated by a user; and a controller for controlling the communicator, wherein the controller is configured to: acquire position information indicating a position of the mobile device and position information indicating a position of the vehicle; determine whether or not the vehicle has arrived at a meeting point; when determining that the vehicle has not arrived at the meeting point, determine whether or not the user has arrived at the meeting point; when determining that the user has arrived at the meeting point, determine whether or not a relative distance is within a range in which the user can visually recognize the vehicle, the relative distance being a distance between the position of the vehicle and the position of the mobile device; generate time information on arrival of the vehicle at the meeting point as guidance information when determining that the relative distance is not within the range in which the user can visually recognize the vehicle; when determining that the relative distance is within the range in which the user can visually recognize the vehicle, determine whether or not the user's line of sight is directed to the vehicle; generate information indicating a direction in which the vehicle is visible when viewed from the user as guidance information when determining that the user's line of sight is not directed to the vehicle; generate information on a distance between the vehicle and the user as guidance information when determining that the user's line of sight direction is directed to the vehicle; and output sound data including the guidance information from the communicator to the mobile device. a communicator for communicating with a vehicle and a mobile device operated by a user; and a controller for controlling the communicator, wherein the controller is configured to: acquire position information indicating a position of the mobile device and position information indicating a position of the vehicle; determine whether or not the vehicle has arrived at a meeting point; when determining that the vehicle has not arrived at the meeting point, determine whether or not the user has arrived at the meeting point; when determining that the user has arrived at the meeting point, determine whether or not a relative distance is within a range in which the user can visually recognize the vehicle, the relative distance being a distance between the position of the vehicle and the position of the mobile device; generate time information on arrival of the vehicle at the meeting point as guidance information when determining that the relative distance is not within the range in which the user can visually recognize the vehicle; when determining that the relative distance is within the range in which the user can visually recognize the vehicle, determine whether or not the user's line of sight is directed to the vehicle; generate information indicating a direction in which the vehicle is visible when viewed from the user as guidance information when determining that the user's line of sight is not directed to the vehicle; generate information on a distance between the vehicle and the user as guidance information when determining that the user's line of sight direction is directed to the vehicle; and output sound data including the guidance information from the communicator to the mobile device. acquire position information indicating a position of the mobile device and position information indicating a position of the vehicle; determine whether or not the vehicle has arrived at a meeting point; when determining that the vehicle has not arrived at the meeting point, determine whether or not the user has arrived at the meeting point; when determining that the user has arrived at the meeting point, determine whether or not a relative distance is within a range in which the user can visually recognize the vehicle, the relative distance being a distance between the position of the vehicle and the position of the mobile device; generate time information on arrival of the vehicle at the meeting point as guidance information when determining that the relative distance is not within the range in which the user can visually recognize the vehicle; when determining that the relative distance is within the range in which the user can visually recognize the vehicle, determine whether or not the user's line of sight is directed to the vehicle; generate information indicating a direction in which the vehicle is visible when viewed from the user as guidance information when determining that the user's line of sight is not directed to the vehicle; generate information on a distance between the vehicle and the user as guidance information when determining that the user's line of sight direction is directed to the vehicle; and output sound data including the guidance information from the communicator to the mobile device.