A wireless communication apparatus includes an X-ray sensor that transmits X-ray image data, a wireless access point that receives the X-ray image data from the X-ray sensor by wireless communication, and an entry apparatus that communicates with the X-ray sensor by short-range communication. A wireless setting apparatus sets wireless communication parameters for starting the wireless communication between the X-ray sensor and the wireless access point to the wireless access point and sets the same wireless communication parameters as those set to the wireless access point to the X-ray sensor by performing short-range wireless communication from the entry device.