A driving method of a privacy apparatus is provided. The privacy apparatus includes a light-transmissive layer and a plurality of electrically switchable optical structures. The light-transmissive layer includes a plurality of trenches not crossing over each other. The electrically switchable optical structures are respectively disposed in the trenches. An extension direction of each of the trenches is inclined relative to an edge of the privacy apparatus on a plane of the privacy apparatus. The driving method of the privacy apparatus includes applying a driving electric field to a part of the trenches to render a part of the electrically switchable optical structures light-transmissive, and maintaining the other part of the electrically switchable optical structures opaque. Besides, a privacy apparatus is also provided.