A print system in which a printer and a client personal computer are connected to a network. The printer may include a storage unit configured to store a residual quantity information of sheets of paper in a paper feed cassette, a communication unit configured to transmit the residual quantity information to the client personal computer, and a printing unit. The client personal computer may include a generation unit configured to generating print data corresponding to a print job, and a control unit configured to acquire the residual quantity information and a number of sheets of paper necessary for the print job and compare the residual quantity information and the number of sheets of paper necessary. Upon judging an occurrence of exhaustion of sheets of paper according to a comparison result, the control unit may notify a user before starting printing in the printer.