An electronic device attached to a vehicle and a control method therefor are disclosed. A control method for an electronic device attached to a vehicle according to the present invention comprises the steps of: acquiring driving information from a sensor included in a vehicle while the vehicle is running; determining a dangerous event having occurred while the vehicle is running, on the basis of the acquired driving information; and providing an image associated with the determined dangerous event, on the basis of information associated with the determined dangerous event from among the driving information. Accordingly, an electronic device attached to a vehicle provides an image relating to a situation in which a dangerous event is expected to occur, on the basis of detected driving information. Through the provided image, a vehicle driver can develop safe driving habits.