Method and system for calibrating a plurality of voltages of a light-emitting element and a plurality of grayscale values of a respective pixel of the light-emitting element on a display panel are provided. The method may include determining a mapping correlation between the plurality of voltages of the light-emitting element and a plurality of luminance values of the light-emitting element, determining N grayscale values of the pixel, and determining N first luminance values each corresponding to the respective one of the N grayscale values. The method may also include determining N first voltages mapped to the N first luminance values using the mapping correlation and determining, of each one of the N first luminance values, (M−1) second luminance values. Each one of the (M−1) second luminance values may correspond to a different dimmed luminance value of the respective first luminance value.