We use a self-consistent simulation model to study how the electron precipitation is caused by whistler-mode chorus waves. Unlike previous studies that used test particle methods that ignore particle feedback, our model capture fully coupled wave-particle interactions. The results show that chorus waves can drive energy-dispersive, quasi-periodic electron precipitation, with precipitation intensity comparable with satellite observations from ELFIN. Moreover, we show that variations in plasma density and background magnetic fields can modulate chorus wave dynamic, causing the 'on-off' modulation in precipitation. This study improves our understanding of how space weather processes transfer energy from the magnetosphere into the ionosphere.