The invention provides a compound machine, a display sharing method and a computer readable recording medium. Under the condition that the display displays pictures of two different systems, comparedwith the prior art, the icon can be moved more easily. The panel controller (5) causes the display module (4A) to display a first screen of the MFP unit (2) and a second screen of the server unit (3)side by side. The MFP unit (2) supplies image data of an icon disposed on a first screen to the server unit (3) and the panel controller (5). When an operation of moving an icon from a first screen toa second screen is performed, a panel controller (5) displays the icon on a display module (4A) so as to move the icon from the first screen to the second screen according to the operation.