An X-ray imaging system includes an X-ray Talbot imaging device and an image processing device. The image processing device includes a hardware processor and a display. The hardware processor generates multiple types of reconstructed images based on each of moire images having different subject set angles captured by the X-ray Talbot imaging device groups the reconstructed images by subject set angle and by type detects, in each reconstructed image, a grating direction of the gratings and the subject set angle relevant to the grating direction matches an image direction in each of the grouped reconstructed images with a reference direction based on the grating direction and the subject set angle performs a same image adjustment process on the grouped reconstructed images and causes the display to display the reconstructed images grouped by subject set angle or by type.
