Abstract: Provided is a method of revising a printing error in a PCB, including acquiring alignment mark coordinates and recognition mark coordinates formed at corners of each sheet through design specification information of the PCB, acquiring distorted alignment mark coordinates and recognition mark coordinates of each sheet through actually measured information of the PCB, calculating coordinate information acquired from the design specification information of the PCB and coordinate information acquired from the actually measured information of the PCB to acquire a revision coefficient, calculating an actual deformation value of the PCB using the revision coefficient, and converting the actual deformation value into deformation data of a binary image applied to the design specification information to be revised, and performing a printing operation on the PCB using the deformation data as a reference.