Security system for providing security service of tracking and monitoring object which is not reconized using monitoring camera, and method for providing security service using the same security system

PURPOSE: A security system and a security service supplying method thereof are provided to select an object which is difficult to recognize an image by a first camera and to trace the selected monitoring object by a second camera. CONSTITUTION: A monitoring object tracing device(200) includes a receiving unit(210), a controlling unit(220), and a memory(230). The receiving unit receives a monitoring objects selection signal from a monitoring object selecting unit(100). The controlling unit traces the object by controlling a second camera if the monitoring object selecting signal is received from the receiving unit.