A method for performing input operations to a mobile device, the method comprising: detecting an area touched by a user's hand and coordinates of a location input via a pen, on a touch panel of the mobile device, the touch panel comprising a capacitance type touch panel for creating a touch event in response to the user's hand touch, and an electromagnetic induction type touch panel for creating a touch event in response to the pen touch; detecting whether the user's hand using the pen is a left hand or a right hand by comparing the shape of the detected user's hand touch area with a right-handed template and a left-handed template that are stored in a storage unit of the mobile device; compensating the detected pen input coordinates for an error with compensation data, based on the detected user's hand using the pen, wherein the compensating of the detected pen input coordinates comprises selecting a Look Up Table corresponding to the detected user's hand from a Look Up Table Database of a number of Look Up Tables (LUT 1... LUT N) corresponding to the user's pen holding habits, extracting compensation data corresponding to the detected pen input coordinates from the selected Look Up Tables, and reflecting the extracted compensation data to the detected pen input coordinates; and displaying the compensated pen input coordinate, characterized in that the method further comprises: setting a reference point in the detected user's hand touch area; determining a distance between the detected pen input coordinates and the reference point; and detecting a pen tilt via the determined distance, wherein the Look Up Table is selected based on the detected pen tilt. detecting an area touched by a user's hand and coordinates of a location input via a pen, on a touch panel of the mobile device, the touch panel comprising a capacitance type touch panel for creating a touch event in response to the user's hand touch, and an electromagnetic induction type touch panel for creating a touch event in response to the pen touch; detecting whether the user's hand using the pen is a left hand or a right hand by comparing the shape of the detected user's hand touch area with a right-handed template and a left-handed template that are stored in a storage unit of the mobile device; compensating the detected pen input coordinates for an error with compensation data, based on the detected user's hand using the pen, wherein the compensating of the detected pen input coordinates comprises selecting a Look Up Table corresponding to the detected user's hand from a Look Up Table Database of a number of Look Up Tables (LUT 1... LUT N) corresponding to the user's pen holding habits, extracting compensation data corresponding to the detected pen input coordinates from the selected Look Up Tables, and reflecting the extracted compensation data to the detected pen input coordinates; and displaying the compensated pen input coordinate, characterized in that the method further comprises: setting a reference point in the detected user's hand touch area; determining a distance between the detected pen input coordinates and the reference point; and detecting a pen tilt via the determined distance, setting a reference point in the detected user's hand touch area; determining a distance between the detected pen input coordinates and the reference point; and detecting a pen tilt via the determined distance, wherein the Look Up Table is selected based on the detected pen tilt.