The invention relates to the ink discharge correction method and the correction system of an inkjet printing device, and the inkjet printing device. The ink discharge correction method of the inkjet printing device comprises the following steps of carrying out ink discharge condition detection on each nozzle of an inkjet print head; calculating the number of nozzles ejecting ink of which parameters do not satisfy a preset parameter specification requirement and the number of nozzles which do not eject the ink; and according to an allowable deviation range, carrying out different intensity repairing on the nozzles which do not ejecting the ink qualifiedly. By using the ink discharge correction method of the inkjet printing device, a larger number of nozzles which ejecting the ink qualifiedly can be corrected and obtained, and a nozzle utilization rate is increased.