Machine lock control method of remote control system and system

The invention discloses a machine lock control method of a remote control system and a system. The method comprises, through detection for a hardware device in a GPS terminal and/or detection for communication mechanisms between the GPS terminal and remote control equipment and between the GPS terminal and a main control terminal, controlling whether to send a machine lock instruction to the main control terminal. The technical problem that the main control terminal cannot be normally controlled to send out the machine lock instruction and which is resulted from an abnormity of the GPS terminal or sending abnormities of communication between the GPS terminal and other control terminals in the prior art is solved.