The present disclosure provides dimming glass, a dimming module and an operating method thereof. The dimming glass includes: a first glass substrate and a second glass substrate arranged opposite to each other; a first electrode and a second electrode arranged between the first glass substrate and the second glass substrate; a liquid crystal dimming layer arranged between the first glass substrate and the second glass substrate; and a heating layer arranged between the liquid crystal dimming layer and the first glass substrate, and configured to heat the liquid crystal dimming layer upon the receipt of an electric signal.