INFORMATION PROCESSING SYSTEM, PROCESSING DEVICE, AND INFORMATION PROCESSING METHOD

A processing device and an information processing system included in a network can select a device to be connected. A processing device (2) includes a controller (21) and a communicator (23). Software includes a first implementation program to cause the controller (21) to implement a predetermined function. First use-data is used to execute the first implementation program. The controller (21) included in a logical network (3) connects with, of other processing devices (2) with each of which the controller (21) can communicate, a processing device (2) that implements, based on a second implementation program or second use-data, the same function as the function implemented when the first implementation program is executed.