G7 calibration workflow was elaborated according to the core idea of G7. Control points of calibration run and confirmation run were analyzed. The main calibration steps in a typical G7 calibration workflow with Curve2 were introduced, and several important parameters needed to control in the workflow were analyzed, such as gray balance, Neutral Print Density Curve, Highlight Range, Tone Value Increase and so on. The purpose was to provide reference for theoretical research and practical production.