The use of computer simulation techniques in the control system design of the laminar cooling process in a hot mill can significantly reduce the development cost while ensuring maximum production safety. The case-based modelling strategy was proposed and implemented in a software package. The functional structure of the software package was discussed in detail. The interfaces and functions of the software package were introduced. The results of industrial experiments can be directly visualized in the software package, allowing accurate and instant comparison of the model predictions with real measurements. The software package provides the simulation platform for research into advanced modelling and control strategies of the laminar cooling process in a hot rolling mill. The use of computer simulation techniques in the control system design of the laminar cooling process in a hot mill can significantly reduce the development cost while ensuring maximum production safety. The case-based modeling strategy was proposed and implemented in a software package. The functional structure The software for the software package was introduced in detail. The results of industrial experiments can be directly visualized in the software package, allows accurate and instant comparison of the model predictions with real measurements. The software package provides the simulation platform for research into advanced modeling and control strategies of the laminar cooling process in a hot rolling mill.