To provide a robot security system which prevents wrong modification of patrol schedule of a security robot, and which the robot can flexibly respond to the modification of the patrol schedule, without complex change operations.

This system is provided with a transmitting part 401 which transmits security status information of a security area by a facility-side security system prepared in a facility, where the security robot 101 patrols, to the security robot 101, a transmitting part 402 which receives the security status information and inputs it to the security robot, I/O 106, and a control part 102 which makes the security robot 101 patrol, in response to patrol data which course and time of the patrol are decided, based on the security status information.

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