Imaging system of security camera by event detection

A system and detecting and photographing an event of a monitoring camera is provided to establish a good security and monitoring system by overcoming degradation of picture quality generated when a captured image is magnified so as to be analyzed. A monitoring camera(10) is installed at a monitoring target area and captures of an image of a certain monitoring region. An event detecting unit(20) searches image information captured by the monitoring camera and detects at least one event among a plurality of events including a movement. A zoom-in camera(30) captures still images at certain time intervals of the event occurred region. An image processing unit(40) receives the captured image information from the monitoring camera, receives the captured still image from the zoom-in camera, and re-arranges and combines them by frames. A zoom-in camera controller(50) operates the zoom-in camera if an event occurs.