A job execution system includes a terminal apparatus and an image processing apparatus. The terminal apparatus includes an accepter that accepts a value set by a user for one or more than one setting item to execute a job by the image processing apparatus and a transmitter that transmits the job including the accepted value, to the image processing apparatus. In the image processing apparatus, a judger judges whether or not there exists a setting item for which the value "to be specified" is set in advance, among those included in the job received by a receiver, to execute the job. And if it judged that there exists, a job executor puts on hold execution of the job and a display portion displays a setting screen that allows a user to specify a value for the setting item for which the value "to be specified" is set in advance.