Abstract: The automatic image painting device according to the present invention is a device for painting a specific image by spraying paint on a target surface, comprising a paint spray nozzle unit for spraying paint on the target surface in a straight-line pattern of a predetermined length, a support frame unit that supports the paint spray nozzle unit to enable movement along the X-axis, Y-axis, and Z-axis, a direction changing unit that rotates the paint spray nozzle unit at a predetermined position on the support frame unit to change the orientation of the straight-line pattern, and a control unit for controlling the movement of the paint spray nozzle unit on the support frame unit and the rotational movement of the paint spray nozzle unit.