The invention provides a Keil software-based simulation system and a soft circuit board simulating method adopting the same. The Keil software-based simulation system comprises an experimental simulation board plug-in and keil three-dimensional simulation software. The soft circuit board simulating method comprises the following steps: step (1), software installation; step (2), use of the experimental simulation board plug-in; step (3), use of the keil three-dimensional simulation software. The simulation effect is only associated with a circuit and independent of programming language.