A processing system includes a support table with a support surface to support a processing target and including a type mark that includes information on a type of processing, and a controller configured or programmed to include a storage to store a processing image showing contents of processing for each type of processing, an acquirer to acquire a captured image of the support surface including the type mark, an identifier to identify the type of processing included in the type mark in the captured image, a processing image acquirer to acquire a processing image corresponding to the type of processing identified by the identifier as an identified processing image, and a display controller to display the captured image and the identified processing image in an overlapping manner.