Provided is a processing management method including: causing a management server to execute Step (S2-14) in which a server side account specified from user information is acquired and Step (S2-15) in which server side permission processing correlating to the server side account is read out; and causing a multi-function printer to execute Step (S2-16) in which the user information is transmitted to the management server, Step (S1-17) in which an apparatus side account is acquired, Step (S1-18) in which apparatus side permission processing correlating to the apparatus side account is read out, Step (S1-22) in which execution of processing, usage of which is permitted by both of the management server and the multi-function printer, is permitted, and a Step in which, when execution of the permitted processing is requested, the requested processing is executed.