Delhi Metro is the world’s thirteenth largest metro system in terms of length and is India's first modern public transportation system built on state of the art technologies. The life safety systems are of paramount importance while carrying millions of passengers daily, the systems are required to be designed in such a manner that in case of any emergency situation the passengers shall be safely evacuated from transit network in minimum time. This paper discusses in detail the different life safety systems provided in the underground metro station building e.g. Smoke Management System, Fire Fighting System, Fire Alarm System, Emergency Power Supply System and Emergency Lighting System.