To alleviate the traffic congestion in major urbam cities in China, the regulation of parking demand and parking price is given in central areas during peak hours. Based on the implementation of the regulation at Beijing downtown area, a multi-modal travel survey was carried out and a bi-level programming model for adjesting the government-designated parking fares and the cheaper and convenient way for residents to travel is set up. The numerical calculation provide a proper relationship between the parking price and the use of parking facilities and commuter vehicles. The parking pricing policies can effectively alleviate the commuter traffic congestion at central area and provide references to other cities.