1. A method for finding and digitally evaluating illegal image material, wherein a data memory is searched for image material, the method comprising: classifying found image material via a classification method based on a depicted image content as potentially illegal image material or as legal image material; performing an age determination of the depicted persons in the image material classified as potentially illegal and potentially illegal image material that shows at least one person whose determined age falls below a predetermined age and is classified as illegal image material; detecting biometric features of the persons shown in the illegal image material and comparing the biometric features with at least one database containing biometric features; and detecting at least one contained additional feature in the illegal image material and comparing the at least one contained additional feature with at least one relevant database.