To provide an image forming device which can execute a designated job at a more accurate time.

This image forming device 100 compares time reliability information of an information processing device 200 being included in a time designating job JB which is received from the information processing device 200, and time reliability information of the image forming device 100. When it is judged that the time of the image forming device 100 has a higher reliability than the time of the information processing device 200, the time designated job JB is executed with the time of the image forming device 100 as a reference. When it is judged that the time of the information processing device 200 has a higher reliability than the time of the image forming device 100, the job executing time is corrected.

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