A method and apparatus for stabilizing a locus of an object detected from a continuously-captured image, and an image monitoring system are provided. The apparatus includes: a detection unit which detects first information about the locus provided at a first time, from the continuously-captured image; a storage unit which stores second information about the locus provided at at least one other time; a correction unit which corrects the first information based on the second information; and a display unit which applies the corrected first information to the object in the continuously-captured image to display a modified locus corresponding to the corrected first information.