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.