Abstract: The basical ink database was established in the computer colormatching system, and used to match spot color. The basical ink database was detected through spectral reflectance curves, color density curves and ink color correction. The selection of spot color formulation was also introduced. The results showed that the accuracy of ink database directly affected the result of spot color; the computer colormatching system had high accuracy and spot color could meet the requirement after amending for 1 to 2 times. The perfect ink database was essential for quickly and accurately matching spot color. Spot color matching with the computer colormatching system should have the features of simple and convenient operation and high accuracy. The color accuracy could be improved by color difference and spectral reflectance curve.