Abstract: Tianjin Cement Industry Design and Research Institute Co., Ltd. has developed a computer emulation testing bed with 3D numerical simulation function based on engineering practice. By using this system, the engineers of TCDRI engaged production commissioning on 3# line of Huarun Cement (Pingnan) Co., Ltd. Forecasting on temperature field distribution on precalciner is made successfully, thus provide a new method for cement plant commissioning.