A wireless field device may include a first communication unit that performs wireless communication via a wireless network, a storage unit that stores setting information including at least one of device information specifying the wireless field device, communication setting information for implementing wireless communication via the wireless network, and device setting information prescribing an operation of the wireless field device, and a change control unit that performs control not to enable a change of the setting information when prohibition information representing prohibition of the change of the setting information is received by the first communication unit.