To provide a photographing means capable of reproducing a flaw or the like on the surface of a concrete product such as a bridge pier with high definition.

A photographing method includes: a diaphragm setting means for setting the diaphragm of a lens by a line camera and a distance of a distant object; an entire width setting means for setting the entire width of the distant object to be recorded; and a rotational speed setting means for setting the sub scanning speed of a rotation means by a numerical value set by a distance setting means and the entire width setting means.