Since the calculation of correlated color temperature and color deviation of light source has always been the focus of researchers, an efficient hybrid method based on triangle method, parabolic method, and third-order polynomial method for calculating correlated color temperature and color deviation of light source is proposed. The accuracy of the proposed method is tested and compared with that of Ohno and Robertson methods by using 90005 data sampled from 18001 isotemperature lines with colour temperature between 2000 K and 20000 K at 1 K step, and color deviation between -0.030 and 0.030 at 0.015 step. The test results show that the proposed method is better than Ohno and Robertson methods with maximum absolute difference of correlated color temperature being less than 0.3858 K and maximum absolute difference of color deviation being less than 3.33×10 ^-6 respectively, so it can be directly used in LED spectrum optimization and design.