A facsimile machine is usable additionally as a copy machine and image reader based on its image reading function and printing function. The machine has its operating modes set up by the setting operation on any personal computer connected to it through a communication line and the transfer of setup information to the machine operating modes include a facsimile mode in which a source document is read and the document image is sent to the destination a copy mode in which a source document is read and the document image is printed on a recording medium, a scanning mode in which a source document is read and the document image is sent to a specified computer, and an electronic mail mode in which a source document is read and the document image is sent and stored in an electronic mail box assigned to a user through a communication line.