Abstract: In offset printing color detect and control system, Ink to color experiment data is important for research of ink to color algorithm and accuracy of color control.Open ink to color experiment database is convenient for user to add new data according to his demand, for improving the generality and control accuracy of the color detect and control system.After the determination of the ink to color experiment scheme, the ink to color experiment is carried out aiming at the 4-color offset printing machine of Beiren Group Corporation.The ink to color experiment database is designed considering all the factors that affect the ink to color experiment data;And the open ink to color experiment database management system is developed using Visual C++ and MySQL, and it is convenient for user to query、add、delete、and change data.