A computer software on solid/solid reaction kinetics, KinPreSSR, is one of subsystems in the software, Intellectualized Database Management System on Kinetics of Metallurgy (IDMSKM). KinPreSSR is a Windows application developed using Visual C++ and FoxPro, and includes two main modules, “DIFFUSION” and “REACTION”. The ‘DIFFUSION’ module includes two sub-modules of “database management system (DBMS)” and "Evaluation & prediction". The “DBMS” deals with the diffusion coefficients gathered from reported documents and the data evaluated according to some rules, besides, it can provide users with retrieval of diffusion coefficients. Based on the solutions to the Fick’s first law and the Fick’s second law in the four typical critical conditions, the "Evaluation & prediction" sub-module gives the predication of concentration distribution after diffusion process in solids or computation for diffusion coefficient.