In this study, many samples from two basins have been measured to obtain the fluorescence colors and the differences between homogenization temperatures of the coeval aqueous inclusion and oil inclusion, which proves that there is a positive relationship between the fluorescence colors and the averaged homogenization temperature of oil inclusions, and can be reliably used to indicate the hydrocarbon maturity in spite of the fact that some researchers think that it is dangerous to apply visual description of fluorescence colors to determine maturity of hydrocarbon.