A reading device, comprising: a reading unit configured to read a document and to generate image data representing the read document; an uploading unit configured to upload the image data read by the reading unit to an server on a network; a storage time limit setting unit configured to set a storage time limit within which the image data is stored on the server; a judgment unit configured to judge whether the storage time limit has expired with respect to the image data uploaded on the server; and a data management unit configured to delete, from the server, the image data for which the judgment unit judges that the storage time limit has expired.