The camera photographs a visual field of the user. The controller acquires an image captured by the camera, recognizes, through image recognition processing, a package that is a work target of the user and a hand of the user from the acquired image, determines whether or not the user is in a state of being about to carry a package based on a positional relationship between the recognized package and the recognized hand, and recognizes, through image recognition processing, a package ID from the acquired image in a case where it is determined that the user is in a state of being about to carry the package. The communication part receives delivery information regarding the package corresponding to the package ID from a delivery management server. The controller generates, based on the delivery information, alert information to be presented to the user, and outputs the generated alert information.