PURPOSE: A system for sensing and monitoring a fire in real-time is provided to use an integrated monitoring server connected to a fire sensing device installed in a small-size building through a network. CONSTITUTION: A system for sensing and monitoring a fire in real-time is composed of a fire sensing device(100) and an integrated monitoring server(200). The fire sensing device comprises a sensor unit(110) and a relay(120). The sensor unit has multiple sensors for sensing a fire. The relay is connected to the sensor unit and receives fire information from the sensor unit in real-time. The integrated monitoring server receives the fire information and state information from the fire sensing device through a network and outputs the received information to a homepage. The integrated monitoring server automatically provides managers of related organizations(300) with the information.