To solve the problem of the conventional resource adjusting system in which: idle resources are generated due to continuous securing of resources during the non-use period of an image forming device in a case where the resources are allocated to every image forming device; and the required amount of resources excesses the secured amount of the resources when the secured amount is changed according to the processing load of the resources.

An adjusting device that controls allocation of resources to an image forming device includes state acquisition means to acquire a state event upon a transition of a state of the image forming device; and adjusting means to adjust the resources on the basis of the details of the event.