A communication device includes a wireless communication unit, a memory and a processor. The wireless communication unit is configured to perform wireless communication with an information display device. The processor is configured to perform operations including: receiving first work data including first setting data from the information display device having the first work data by the wireless communication unit; and registering the first work data as storage data in a case where the memory stores second work data including second setting data and in a case where the first setting data and the second setting data are different from each other.