Abstract: The measurement principle and standard set up for the photometric and colorimetric measurement of digital displays panel are presented. The display principles and characteristics of the major products such as CRT, LCD and PDP are introduced. The whole system was calibrated by standard lamp with the standard transferred from the national primary photometric and colorimetric standard. Incorporated with a new spectral detector and a data collection analysis software based on virtual interface technology, the system can measure the unit under test in real time. The uncertainty of the luminance and chromatic coordinates is better than 2% and 0.005 respectively. Major digital flat panel displays in the market are tested, and their parameters such as relative spectral response, luminance, luminance uniformity, contrast ratio, color gamut are calibrated. The test results and performance comparisons are given.