The invention discloses an intelligent full-automatic gun correcting system and method. The system comprises a fixing rack used for fixing a gun body, a laser bullet simulating the normal bullet ballistic trajectory, a sighting device laser transmitting device simulating the sighting trajectory, a bar sight adjusting mechanism used for controlling the left-right movement of a bar sight in the horizontal direction, a sight head adjusting mechanism used for controlling the up-down movement of a sight head in the vertical direction, a laser target used for receiving the fall points of laser beams, and a control circuit used for receiving coordinate information of the fall points and controlling the bar sight adjusting mechanism and the sight head adjusting mechanism to achieve fall point coinciding. The method comprises the following steps that a gun is placed; coordinates of the fall points are calculated; the bar sight and the sight head are adjusted; and gun correcting is finished. The laser technology, the digital image processing technology, the automatic adjusting technology and other means are utilized, full-automatic correction of the gun shooting precision is achieved, and bullet launching and manual intervention are not needed; and the correcting precision and the correcting efficiency are improved, consumption of a large number of bullets in the gun correcting process is reduced, safe gun correction is achieved, and very high practicability and economic benefits are achieved.