The invention discloses an intelligent rotary projector and an automatic calibration method thereof. The intelligent rotary projector comprises a central processor, a camera, a lens hood and a projection lens, the camera, the a spherical rotating joint and the central processor form an automatic rotation device of the projection lens, and a laser ranging sensor, an automatic focusing ring, an automatic aperture ring and the central processor form an automatic focusing and dimming device of the projection lens. According to the intelligent rotary projector disclosed by the invention, the focal length and the aperture of the projection lens are automatically adjusted by the laser ranging sensor, the automatic focusing ring, the automatic aperture ring and the central processor; and the direction of the projection lens is automatically adjusted by the automatic rotation device of the projection lens formed by the camera, a small roller, the spherical rotating joint and the central processor, and optical keystone correction is realized, therefore the automatic calibration method provided by the invention has the advantages of high definition, high precision and high speed.