A remote operation system includes a user terminal 10 that includes a server function unit for operating an internal function of the terminal according to remote operation, a support terminal 20 that remotely operates the user terminal 10, and a relay server 30 that includes an access management unit for holding an access timing to start remote operation of the user terminal 10 by the support terminal 20 and executes access to the user terminal 10 at the access timing. When being accessed by the relay server 30, the user terminal 10 starts up the server function unit to notify the support terminal 20 that the server function unit has been started up. When being notified that the server function unit has been started up, the support terminal 20 starts up a remote operation application to execute remote operation of the user terminal 10.