A method for converting color gamut of a display device, wherein the display device comprises a display panel comprising a display substrate and a plurality of pixel units arranged on a first surface of the display substrate, each pixel unit comprises a plurality of sub-pixels and the plurality of sub-pixels comprise a variable color sub-pixel which is used for emitting light of at least one predetermined color according to a predetermined color gamut standard, and
- the method comprises:
- determining an original color gamut and a target color gamut of the display device;
- determining color of light emitting by the variable color sub-pixels according to the original color gamut and the target color gamut;
- and
- exciting the variable color sub-pixels to emit light, and converting the color gamut of the display device from the original color gamut to the target color gamut.