An information processing device provided with: an application division setting part for assigning execution responsibility for each of a plurality of execution files included in an application to one of a plurality of information processing devices, and for generating execution responsibility assignment information indicating each of the execution files and an information processing device to which the execution responsibility for the execution file is assigned; a communication part for transmitting the execution responsibility assignment information to a network; and an application division execution part for referring to the execution responsibility assignment information to execute an execution file whose execution responsibility is assigned to its own device out of the plurality of execution files.