The present disclosure provides a display apparatus and an operating method thereof. The display apparatus includes a control unit outputting a first signal and a display module coupled to the control unit. The display module continuously displays a first image in a first frame time based on the first signal, the first image has a first pattern, and a first ratio of an area of the first pattern to an area of the first image ranges from 5% to 30%. The first pattern at a first time point in the first frame time has a color located at a first coordinate position in a CIE 1931 chromaticity diagram, the first pattern at a second time point in the first frame time has another color located at a second coordinate position in the CIE 1931 chromaticity diagram, and the first coordinate position is different from the second coordinate position.