A method for syncing different touching systems uses a computer, which is electrically connected with a first input device and a second input device respectively and in which an input of the first input device is controlled by the second input device, to make the first input device and the second device synchronous. The method includes defining at least one correction point on the first input device; receiving time tags of signal inputs at the correction points of the first input device and the second input device respectively; calculating time differences for each time tag at each correction point with respect to other correction points; averaging all time differences for all correction points to determine a deviation value; and delaying a signal transmission of the second input device according to the deviation value.