A wireless communication device in a wireless communication network system that includes a plurality of wireless communication devices, the inside of the system being divided into zones each having a predetermined geographic area, includes a processing unit that, upon receiving a disaster warning message including predicted position information on an occurrence source of a disaster and disaster-influencing information indicating an area to be influenced by the disaster, calculates a disaster-stricken zone including the occurrence source based on the predicted position information, and an affected zone to be influenced by the disaster based on the disaster-influencing information, and performs any one of a process to transfer data that the own device has and a process to change a transfer route from the own device to a destination device, according to the relationship between a zone in which the own device is positioned, and the disaster-stricken zone and the affected zone.