1. A scheduling management system comprising: a scheduling data storage device for storing scheduling data including a date, a time, and a work matter; a member information storage device for storing member information including a user ID, a user name, a flag indicating whether the member is an individual or a group, and ID information of a hierarchical level the member belongs; a calendar information storage device for storing calendar information; a display device for displaying a GUI screen containing a plurality of components; an input device for designating an arbitrary position on the GUI screen and entering an operation relative to the designated position on the GUI screen; and an inter-component communication control unit for, if a movable software component on a certain component constituting the GUI screen is selected with said input device and is moved and superposed upon another component constituting the GUI screen, notifying the motion destination other component of the superposed software component.