INFORMATION SUPPLY METHOD AND STORAGE MEDIUM

An information supply method causes a computer of a terminal device equipped with a camera and mounted in a mobile object to execute: a process of acquiring an image; a process of determining an alert level for an operator of the mobile object is a first alert level or a second alert level that is a level lower than the first alert level based on a surrounding situation of the mobile object obtained from the image; and a process of displaying information appropriate to the alert level on a display provided on a casing in which the camera of the terminal device is provided in accordance with a result of the determination.