A touch device and an operating method thereof are provided. The operating method includes the following steps. A plurality of data baseline values of the touch panel is calibrated and set during an initialization of a touch panel. A plurality of touch data is obtained after scanning the touch panel. A plurality of touch values corresponding to the touch panel is calculated according to the data baseline values and the touch data. A touch point is detected according to the touch values. When the touch data is complied with a re-calibration requirement, the data baseline values are re-calibrated and reset.