The embodiment of the application provides a color constancy correction method and device, and an image processing device. The color constancy correction method comprises the following steps: calculating an R channel gain value of a target image as an initial R channel gain value through a preset algorithm, and calculating a B channel gain value of the target image as an initial B channel gain value; calculating a residual R channel gain value and a residual B channel gain value of the target image through a trained deep residual learning network; obtaining a predicted R channel gain value according to the initial R channel gain value and the residual R channel gain value, and obtaining a predicted B channel gain value according to the initial B channel gain value and the residual B channel gain value; and adjusting the target image according to the predicted R channel gain value and the predicted B channel gain value to correct the color constancy of the target image. Thus, a deep learning network with a shallow network structure is used to accurately correct the color constancy of the image.