In this paper, we design a system that can make calligraphy in real-time by using real Chinese brush. The system consists of two parts: calligraphy stroke generation and ink dispersion. In the calligraphy stroke generation, we use Kalman filter algorithm to deal with the unsmooth points at low speed, and combine arc and linear interpolation method to interpolate points with high speed, then we fill the interpolated points with brush strokes based on experience. In the ink dispersion, modified LBE algorithm was adopted to render initial brush stroke. Finally, our experiments test this system's performance and functionality, it shows that this system works well.