13. An image scanning device, comprising: a scanning unit that scans an original document with a scanning condition to produce image data; a user setting unit that receives the scanning condition set by a user, the scanning condition being used by the scanning unit for scanning the original document; a storage unit that stores a specific condition used by the scanning unit for scanning a specific document, the specific condition including a limited requirement required by the specific document, and a limited scanning condition conforming to the limited requirement; a first determination unit that determines whether the scanning condition satisfies the limited requirement for the specific document; a control unit that causes the scanning unit to scan the original document with the scanning condition if the first determination unit determines that the scanning condition satisfies the limited requirement for the specific document, the control unit causing the scanning unit to scan the original document with an initial condition to produce initial image data, if the first determination unit determines that the scanning condition does not satisfy the limited requirement for the specific document; and a second determination unit that determines, based on the initial image data, whether the original document is the specific document; wherein the control unit causes the scanning unit to scan the original document with the scanning condition, if the second determination unit determines that the original document is not the specific document; and the control unit reads the specific condition from the first storage unit and then causes the scanning unit to scan the original document with the limited scanning condition if the second determination unit determines that the original document is the specific document.
14. The image scanning device according to claim 13 , wherein the second determination unit determines whether the initial image data includes a keyword related to the specific document, and the second determination unit determines that the original document is the specific document if the second determination unit determines that the initial image data includes the keyword.