Taxis are the most important para-transit in Taiwan urban area. Taxi companies, personally-owned taxies and taxi coοperatives are the major operation patterns. After the opening of the establishment of taxi cooperatives in 1995, taxi tlaxi transportation business has grown rapidly. From the legislation of Highway Act 39-1, the taxi license plates will be controlled by the increasing rate of population and road area. Thecalculation base and how to control are key points of this policy. This study reviews current taxi problems, license plate control is the most important issue of taxi management. In order to establish the calculation base and control mechanism, this study considers the government organization, social economic status, population distribution, and taxi operation characteristics, suggests current taxi operation areas could be redesigned into five areas and set as the calculation base. The control method and related improvement strategies are also shown in this research and provided to improve taxi management.