With the security monitoring system, more and more use of computer technology, the same power supply quality also puts forward more and more high requirements. UPS can not only comprehensively improve the quality of power supply, the entire system and even the network data protection, but also to ensure that the utility power outage and the special circumstances of man-made destruction, continue to work. As the security monitoring system on the power supply requirements are high, so you must choose online (sine wave, utility requirements) UPS power supply. System equipped with UPS power supply, the first should estimate the power consumption of the system equipment, the safety factor is generally taken as 1.2-1.5 is appropriate, leaving a sufficient amount of redundancy for the power supply system. Secondly, according to the system requirements of the delayed power supply time, calculate the configuration of the battery pack. Finally, attention should also be paid to the use of the environment, moisture-proof ventilation, pay attention to cooling, to extend the average trouble-free working time, improve the reliability of the system. UPS power supply should be set in the monitoring room, the implementation of unified management. When the utility power is not normal, it will be able to provide uninterrupted power supply to all the equipment of the system in a timely manner, to ensure that the system works properly, to prevent man-made damage, confidentiality, maintenance.