Remote operation system and remote operation server

A remote operation system comprising:

• a working machine including an actuation mechanism;
• a plurality of remote operation apparatuses each including an operation mechanism configured to perform a remote operation of the working machine;
• and
• a remote operation server having a function of intercommunicating with each of the plurality of remote operation apparatuses, wherein a first remote operation apparatus in the plurality of remote operation apparatuses comprises:
• a state detector which detects that a state of at least one of the working machine and an operator is a specified state;
• and
• a first client control device which transmits a first notification corresponding to the specified state, in a case where the state detector detects that the state of at least one of the working machine and the operator is the specified state, and
• the remote operation server comprises:
• a first server arithmetic processing element which receives the first notification, and selects a second remote operation apparatus different from the first remote operation apparatus in the plurality of remote operation apparatuses based on the first notification;
• and
• a second server arithmetic processing element which transmits a second notification in response to the first notification to the second remote operation apparatus or a second client control device of the second remote operation apparatus, and which executes processing for changing remote operation authority of the working machine from the first remote operation apparatus to the second remote operation apparatus.