There are provided a method for authenticating capacitive touch. The method for authenticating capacitive touch according to the invention is executed through a system interworking with a capacitive touch screen that supports multi-touch, the method comprising, a first step of receiving touch point information for the plurality of touch points recognized as multi-touch through the capacitive touch screen, a second step of reading the touch point information and identifying a specified touch point corresponding to any one specified touch portion fixed and arranged in a previously specified position in design among touch portions of a touch device in which a plurality of capacitively touchable touch portions are arranged according to a previously designed unique geometric relationship, a third step of coordinate-rotating the plurality of touch points or a geometric relationship for the plurality of touch points to match a designed geometric relationship based on a reference point corresponding to the specified touch point, and a fourth step of authenticating whether the coordinate-rotated geometric relationship matches the designed geometric relationship within a tolerance range or identifying the designed geometric relationship matching the coordinate-rotated geometric relationship within a tolerance range among the designed geometric relationships.