1. A method for controlling a camera using information related to an image compression process, comprising the steps of: determining a motion region and a motionless region of an input image photographed by the camera based on a motion vector of a macro block for generating a compressed data of the input image; estimating a center value and a size of a moving object from the motion region; and controlling the camera so that the camera tracks and photographs the moving object based on the estimated center value and size.