An electronic device comprising: a pen input device configured to support an electromagnetic induction function and an electrostatic pen function, and comprising a resonant circuit element of which the impedance varies according to write pressure, such that the resonant frequency and electromagnetic induction frequency of the pen input device vary according to write pressure; a touch screen device including a digitizer pad, an electrostatic capacitive touch panel disposed above the digitizer pad, a digitizer pad controller configured to detect a recognition coordinate and a write pressure of the pen input device calculated from electromagnetic induction from the digitizer pad as the pen input device comes close to the touch screen device, and a touch panel controller configured to detect an input coordinate in relation to a change of an electrostatic capacitance from the touch panel; and a processor configured to: perform generation of inclination information of the pen input device,wherein the generation of inclination information comprises the processor being configured to: generate an inclination angle of the pen input device as a function of the distance between the tip of the pen input device and a coil center of an electromagnetic induction unit, the recognition coordinate information provided by the digitizer pad controller, and the input coordinate information provided by the electrostatic capacitive touch panel controller, wherein the distance is calculated through table conversion of the write pressure or an arithmetic operation of the write pressure; and generate a unit vector V in the inclined direction of the pen input device as another function of the recognition coordinate information provided by the digitizer pad controller, and the input coordinate information provided by the electrostatic capacitive touch panel controller; wherein the input coordinate is the touch position of the tip of the pen input device detected by the touch panel controller through the change of the electrostatic capacitance from the electrostatic capacitive touch panel. a pen input device configured to support an electromagnetic induction function and an electrostatic pen function, and comprising a resonant circuit element of which the impedance varies according to write pressure, such that the resonant frequency and electromagnetic induction frequency of the pen input device vary according to write pressure; a touch screen device including a digitizer pad, an electrostatic capacitive touch panel disposed above the digitizer pad, a digitizer pad controller configured to detect a recognition coordinate and a write pressure of the pen input device calculated from electromagnetic induction from the digitizer pad as the pen input device comes close to the touch screen device, and a touch panel controller configured to detect an input coordinate in relation to a change of an electrostatic capacitance from the touch panel; and a processor configured to: perform generation of inclination information of the pen input device,wherein the generation of inclination information comprises the processor being configured to: generate an inclination angle of the pen input device as a function of the distance between the tip of the pen input device and a coil center of an electromagnetic induction unit, the recognition coordinate information provided by the digitizer pad controller, and the input coordinate information provided by the electrostatic capacitive touch panel controller, wherein the distance is calculated through table conversion of the write pressure or an arithmetic operation of the write pressure; and generate a unit vector V in the inclined direction of the pen input device as another function of the recognition coordinate information provided by the digitizer pad controller, and the input coordinate information provided by the electrostatic capacitive touch panel controller; wherein the input coordinate is the touch position of the tip of the pen input device detected by the touch panel controller through the change of the electrostatic capacitance from the electrostatic capacitive touch panel.