The traditional AC/DC rectifier usually results in low power factor and serious harmonic distortion and it will bring about the serious pollution to power system. This thesis proposes boost power factor correction technique to solve these problems. First, we aim at power factor correction circuit which need input voltage sensing, to study its operating principle and design consideration, then design applicable voltage compensator by the frequency analysis and perform the simulation and implementation using the developed criterion. In order to prevent the shortcoming that power factor correction circuits with input voltage sensing and complexity is raised for a multiplier must be added to controller, we develop the power factor correction circuit without input voltage sensing. We perform the operating principle and control function by simulation, develop hardware scheme by analog components and place load variation to measure power factor and total harmonic distortion. According to experimental results and simulation, we confirm the new power factor correction circuit. When the full load is placed, the power factor can achieve 0.99 and the total harmonic distortion is lower than 8%.