Teleoperated robot systems have recently been deployed in disaster response action such as gathering information in a disaster-stricken area. In that situation, it is important to utilize the failed operational information when the operator trains teleoperation skill. In this paper, we propose a storing and warning method of perilous environment for teleoperation of rescue robot using potential field. Further, we confirmed that proposed method can detect the perilousness of the current environment based on previous perilous environment and indicate it to the operator of the rescue robot.