An apparatus controller performs: updating a number of mounting stored in an apparatus memory when a new consumable is mounted on an image processing apparatus; updating a life stored in the apparatus memory in response to execution of image processing; and transmitting, at a particular timing, the number of mounting and the life to a server. A server controller performs: in response to receiving the number of mounting and the life, not placing an order for the new consumable when the number of mounting is larger than a number of orders or the life is longer than or equal to a particular value, and placing the order for the new consumable when the number of mounting is smaller than or equal to the number of orders and the life is shorter than the particular value; and when the order is placed, updating the number of orders in a server memory.