1. A document-image-data providing device which provides document image data to an information processing device, comprising: a document image inputting unit configured to input document image data; an area recognition unit configured to recognize a text area of a document image element containing text data among document image elements constituting the input document image data, and another area of a document image element containing data other than the text data; a text data acquiring unit configured to acquire text data contained in the text area recognized by the area recognition unit; a providing unit configured to provide, in response to a document image data request received from the information processing device, both image data generated from the input document image data to have a resolution lower than a resolution of the input document image data and the text data acquired by the text data acquiring unit, to the information processing device; an image generating unit configured to generate first document image data having a first resolution lower than the resolution of the input document image data and second document image data having a second resolution lower than the first resolution of the first document image data; and an element extracting unit configured to extract, when a document image element of the input document image data is selected in the information processing device, element data of the selected document image element from the input document image data, wherein the providing unit is configured to provide the element data extracted by the element data extracting unit, to the information processing device.