In an image processing apparatus including a reconfigurable device, a plurality of configuration data items for configuring a circuit for realizing a predetermined function in the reconfigurable device and for arranging and wiring the respective circuit at differing locations of the device to each other are stored in a memory, and operation information is obtained and accumulated based on an operation time of the circuit for realizing the predetermined function each time a job using the circuit for realizing the predetermined function is executed. Then, when the accumulated value exceeds a threshold, the circuit for realizing the predetermined function is configured in the reconfigurable device using other configuration data corresponding to the circuit for realizing the predetermined function and stored in the memory.