Gating system design process is a simple way and unique approach. Based on the mass or volume of casting as well as geometry thickness and casting alloy type, the system can estimate the filling time and inner gate area automatically, then guide the user to select the casting machine correctly for a reasonable filling ratio of chamber. It can also predict the 1st phase and 2nd phase speed, the critical shift point and other process parameters also could be calculated. Finally, we can adjust the speed up ratio for each element of gating system to match the total speed-up ratio. All the number of gates and runners could be evaluated and adjusted in real time.