The invention provides a device and a method for correcting a perspective deformed document image. The correcting device comprises a horizontal vanishing point determining unit for detecting horizontal vanishing points of the perspective deformed document image; a vertical vanishing point determining unit for detecting vertical vanishing points of the perspective deformed document image; a perspective deformation correction converting unit for correcting the perspective deformed document image; the horizontal vanishing point determining unit comprises a direct horizontal line segment detecting unit and a indirect horizontal line segment detecting unit, as well as a horizontal vanishing point detecting unit, the horizontal vanishing point detecting unit detects the horizontal vanishing points according to a direct horizontal line segment detected by the direct horizontal line segment detecting unit and an indirect horizontal line segment detected by the indirect horizontal line segmentdetecting unit.