A remote startup system includes a first terminal (200A) and a second terminal (200B), a center server (100) configured to communicate with each of the first terminal (200A) and the second terminal (200B) and receive a startup request from each of the first terminal (200A) and the second terminal (200B), and a vehicle (2) on which a driving device is mounted, the vehicle (2) being configured to communicate with the center server (100), receive a startup request from the center server, and start up the driving device. The remote startup system is configured to prohibit startup of the driving device based on a startup request from the second terminal (200B) when the driving device is started up and being operated based on the startup request from the first terminal (200A) or when the driving device is likely to be started up based on the startup request from the first terminal (200A).