The invention discloses a shared printing method and a shared printing system for printers. The shared printing method comprises the steps that a printing reservation request sent by a mobile terminalis received, wherein the printing reservation request contains an identification number of a target printer and to-be-printed data; the to-be-printed data is sent to the target printer correspondingto the identification number for caching; a printing starting request sent by the mobile terminal is received; the target printer is controlled to print the to-be-printed data according to the printing starting request; and printing progress of the target printer is acquired in real time, and after printing by the target printer is completed, the target printer is controlled to delete the to-be-printed data. Through the shared printing method and the shared printing system, remote reserved printing can be realized, and printing time is saved.