A robot was designed based on home environment. According to analysis of safety hazard at modern home, the typical safety hazards were selected. Multi-sensor was adopted to monitor the typical safety hazards, and the alarm message was sent to the owner by GSM mobile network.The pretreatment of specific safety hazards was conducted by the owner through the Internet technologies. Experimental results show that the robot system can monitor in real time on the home safety hazard with good stability, and can achieve early warning and remote handling of specific security risks.