A lid system includes: a lid for a vehicle, the lid being configured to be opened when the vehicle is supplied with energy; a lid locking device for the lid; a control device configured to control the lid locking device; and a switch operable by a user. When the switch is turned on, the control device interlocks a locked state and an unlocked state of the lid locking device with a locked state and an unlocked state of a door locking device for a door of the vehicle. When the switch is turned off, the control device does not interlock the locked state and the unlocked state of the lid locking device with the locked state and the unlocked state of the door locking device.