Apparatus, system and method for inputting and outputting data based on hand operation

The present invention is an input unit for converting the result of sensing the hand operation, and sensing an electrical signal; A controller for creating a graphical object based on the electric signal; And it discloses an input-output device of the hand-motion-based, including a display unit that displays the generated graphic object. The graphics object is, by connecting the node representing the smallest unit of information and node and includes a link indicating the relationship between the nodes. The graphical objects may also include a layer showing the property as a whole for the graphic object including, and includes at least one node. In addition, the input and output device of said hand gesture-based server and client servers connected through a communication network is disclosed a client system. Sensing, sensors, touch screen, display, XML, node, link, layer