In a printing system built on a predetermined network, a printing apparatus receives a print job requested by a print request terminal via a printing server and processes the print job, thus performing printing corresponding to the print job. The printing server comprise a first-in first-out type of server-side job buffer portion in which a server-side queue for print jobs is formed to temporality memorize print jobs in the order of arrival of the print jobs requested by the print request terminal and a server-side buffer control portion for changing the order of the print jobs memorized in the server-side queue in response to an order change request signal coming from the printing apparatus. The printing apparatus comprises an event detection portion and an order change request portion. Print jobs read out from the server-side job buffer portion in the order of the print jobs memorized in the server-side queue are transmitted to the printing apparatus.