The purpose of this disclosure is to reduce viewer dissatisfaction caused by delays in communication, processing or the like in a system in which a server relays data reception and transmission between a terminal used by a distributor and a terminal used by a viewer. A command processing server which is connected to a command issuing terminal and a command executing terminal comprises: a reception unit which receives a command pertaining to a command execution terminal from a command issuing terminal; a notification unit which notifies the command execution terminal that a command has been received; and an execution instruction unit which transmits, to the command execution terminal, an instruction to execute a command on a command execution terminal, after the command execution terminal has been notified that a command has been received.