A management apparatus transmits a reservation request for specifying time for turning off power supply of an image processing apparatus in response to determination that current time is in a time period for turning off the power supply of image processing apparatus if a start-up request is received from the image processing apparatus, transmits a start-up response for permitting start-up of functions other than a communication function provided in the image processing apparatus when a reservation response, to the reservation request from the image processing apparatus, including specified time for turning off the power supply of the image processing apparatus is received, and transmits a command for turning off the power supply of the image processing apparatus at the time specified by the reservation response, to the image processing apparatus.