An information brokering system according to an embodiment of the present invention is an information brokering system including a server that generates request-side data based on provision-side data received from a provision-side device, and provides the request-side data to a request-side device, the server evaluating a provision-side user having the provision-side device that generated the provision-side data which was a source of the request-side data, based on an amount of the request-side data provided to the request-side device, and the server calculating an amount of the request-side data receivable by a request-side user having the request-side device, based on the evaluation at a time when that request-side user was the provision-side user.