An image-forming apparatus includes: a receiving unit that receives a request of a user; a fixing unit that heats an unfixed image on a recording medium to thereby fix the same to the recording medium; an executing unit that executes at least one function that consumes electric power other than a fixing function by the fixing unit; and a controller that controls to reserve execution of the other function by the executing unit that is required to execute the request in the case where electric power consumption exceeds a prescribed value because a start-up operation of the fixing unit and the execution of the other function by the executing unit are performed in parallel, and the fixing unit is used to execute the received request during the start-up operation that raises the temperature of the fixing unit to a prescribed target temperature with a prescribed amount of electric power.