Abstract: The subsystem on Kinetic Prediction of Gas/Solid Reactions, KinPreGSR, in Intellectualized Database Management System for Kinetics of Metallurgy (IDMSKM) was presented.The application of Windows as working bench, Visual C/C++ and Foxpro as working languages ensures the graphical and intellectuyl features of KinPreGSR.The interface design combining the model classification, organization with the characterization description of the reaction system links the information to be predicted with the characterizations of the reaction system.With the thermal decomposition of CaCO₃ as an example, the main principles and the method for the assessment of apparent activation energies in KinPreGSR were stated.