In this paper, based on several tables and computing formulas of the Linke turbidity factor suggested in the literatures, it is found that the absorptions of solar radiation by some gases, such as O3, CO2, N,etc. in atmosphere, haven't carefully been considered in the most old methods, thus producing the greater systematic errors compared with the real values. Here, the computing formulas and tables obtained from the most recent research progress could made their contributions to the applications.