This thesis illustrates how we can research and develop on Energy-Saving of Motorized Bicycle.Two functions about Energy-Saving of Motorized Bicycle,the first one is “energy-saving” staying power of battery increasingly, and the other one is the pedal of bicycle connect generator and rotary the pedal of bicycle to recharge the battery.How to make control driver and explain the principles of every control system block in the control driver.At last manufacture bicycle of simulative machine to try run test. Finally, run test by manufacturing bicycle of simulative machine to show its result.