A failure detection system that includes an image processing unit configured to acquire a morphological image illustrating a morphology of the absorbent article after processing of the absorbent article, in each of the plurality of steps, a failure detection unit configured to detect the existence of a failure location of the absorbent article after processing, based on the morphological image acquired by the image processing unit, and an image display unit configured to display an image of the absorbent article after processing, when a failure location of the absorbent article is detected by the failure detection unit.