1. A method of managing a schedule using a mobile terminal, the method comprising: displaying, on a touch screen, a first schedule table set by a first period unit by including at least one schedule, wherein each of the at least one schedule is represented as an icon of a prescribed type; changing a position of a specific schedule from among the at least one schedule on the first schedule table according to a user's first touch input via the touch screen; displaying a second schedule table set by a second period unit shorter than the first period unit by including a point corresponding to the changed position; and changing at least one of a position and a period of the specific schedule according to a user's second touch input via the touch screen, wherein the changing includes: recognizing one selected from the group consisting of a touch, a long touch and a long proximity touch to a first icon corresponding to the specific schedule, displaying a menu window that includes a shift menu for shifting the first icon and a history menu, and displaying change history information that indicates a change history of the specific schedule on the first schedule table, when the history menu is selected by a touch input from the menu window, wherein displaying change history information includes displaying a first icon corresponding to a current time point of the specific schedule and at least one second icon corresponding to each of at least one previous time point of the specific schedule on the first schedule table, and wherein each of the first icon and the at least one second icon are connected with a line in order of change.