Provided is an operation system 10 that carries out autonomous driving using an operation server 30 which is for an autonomous driving vehicle provided with three-dimensional map data in a storage section 32 and an autonomous driving vehicle 20 which connects to the operation server via a wireless network 50, wherein: a vehicle control unit 61 receives map data, creates a travel route, and creates elevator control information 61e and elevator usage information 61d including a boarding floor and exit floor when an elevator 41 of a building 40 is to be used; the elevator is provided with an elevator control unit that is connected to the operation server and that controls ascending and descending of an elevator car; a control unit of the autonomous driving vehicle sends the elevator usage information and the elevator control information to the elevator control unit; and the elevator control unit outputs audio of an announcement from an audio output unit 43a in the elevator car.