A system finishing method of a host apparatus communicating with an image forming apparatus for performing a printing operation, comprises: selecting system-finishing in an OS (operation system) of the host apparatus; confirming the presence or absence of a printing operation of the host apparatus; and if it is confirmed that there exists the printing operation of the host apparatus, displaying a finish selection message indicating an after-print system finish item.Thus, the present invention provides a host apparatus, which is capable of promoting user's convenience at the time of system-finishing of the host apparatus by providing a user with a finish selection message indicating that the host apparatus is automatically finished after a printing operation is completed, when the user selects the system-finishing of the host apparatus during the printing operation, and a system finishing method thereof.