The invention provides a video monitoring method. According to the video monitoring method, the front head image and the profile projection of a worker being responsible for ticket checking are acquired relatively easily; then, the upper width limit of the profile projection of human hips is calculated according to the obtained front head image; and if the width, intercepted from the projection width, of the human hips is greater than the calculated upper width limit of the profile projection of the human hips, the comparison result indicates that two people pass through a turnstile while being close to each other, so that the situation that two people pass through the turnstile while being close to each other can be automatically and correctly identified and prevented, and fare evasion can be prevented. Meanwhile, the part, 0.50-0.75 H above the ground, of the hips is the widest, and such a height range is defined as the hips, so that the gender difference between men and women can be taken into consideration and the monitoring precision can be higher.