The invention discloses an automatic-toning image processing method and system based on fuzzing. The automatic-toning image processing method includes the steps of respectively carrying out histogram statistic on the red channel, the green channel and the blue channel of an image, obtaining respective highlight pruning values and respective shadow pruning values of the red channel, the green channel and the blue channel, then generating a corresponding red mapping table, a corresponding green mapping table and a corresponding blue mapping table, further carrying out fuzzy processing on the mapping tables to obtain fuzzy mapping tables, and finally and respectively mapping color values of pixel points on the red channel, the green channel and the blue channel of the image according to the fuzzy mapping tables to obtain the final color tone of the image. In this way, the true tone of the image is better restored, tone distribution is more even, tone transition is more natural, and the effect is better.