PURPOSE: To surely input the data without using a mylar sheet by mounting a liquid crystal display on a digitization table.

CONSTITUTION: A cursor 2 and a liquid crystal display 3 are disposed on the digitization table 1, and connected to a computer 4. The X and Y position coordinates of the cursor 2 are always sent to the computer 4 and stored there by a fetching instruction for the coordinate data. Then the stored X and Y position coordinates are processed by the computer 4 and displayed on a display 3 as a graphic pattern. The input X and Y coordinate data are also displayed on the display 3 as the numerical data. Thus it is possible to confirm in real time the presence or absence of the input operating mistake of the graphic pattern already inputted without using a mylar sheet. Thus, no input mistake is occurred.