A power saving touch electronic book, operated by a stylus, including: a proximity sensing unit, used to output an enable signal by detecting the distance the stylus is away from it, wherein the enable signal is at a first level when the distance is not larger than a predetermined threshold, and at a second level when the distance is larger than the predetermined threshold; a control unit, having an enable input end and a touch sensing interface, the enable input being coupled with the enable signal, and the touch sensing interface having a power supply output terminal which will output a power for touch sensing when the enable signal changes state from the second level to the first level; and a touch screen, coupled with the touch sensing interface to access the power for touch sensing and thereby provide a touch sensing function.
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