Printing system, printing method and printing program

In a printing system, a document data transmitting unit transmits document data generated by a document generating device, to a document storing device. A document data transmission/reception unit receives the document data and transmits the received document data to a printer. A storing/monitoring unit detects whether document data is newly stored in a document storing device. A document data acquisition unit acquires the document data when it is detected that the document data is newly stored. A password input unit enters a print password for permitting printing of the document data. A printing unit prints the document data when the print password is correct.