Provided are a vehicle control device and a vehicle control method for keeping necessary functions effective until an occupant gets out of a vehicle. The vehicle control device include a vehicle exit detection part configured to detect a timing at which the occupant gets out of the vehicle, in accordance with a vehicle exit detection signal from a vehicle exit detector set in advance, and a power supply control part configured to control, when the timing at which the occupant gets out of the vehicle is detected by the vehicle exit detection part, a power supply control device so as to carry out any one of: shutting off a power supply to an in-vehicle device installed on the vehicle, thereby bringing the in-vehicle device into a stop state; and supplying a standby voltage to the in-vehicle device, thereby bringing the in-vehicle device into a sleep state.