Air quality models are playing vital roles in tasks concerning the air quality planning and regulatory compliance checking. As the content of air quality models becomes more sophisticated、both in their scientific mechanisms and in their data input、a successful job requires different aspect in supports and specialties. Taiwan EPA urged by this requirement has established the Air Quality Modeling Center (AQMC)、which recruits expertise and data resources in different institutes over the Island and is connected over the Internet platform to carry out its missions. In this project、it is intended to layout the organization and operation of AQMC、Taiwan. As an answer to please from the air pollution community、AQMC’s operation is aimed to serve the community needs in three major areas、namely the expertise in advanced air pollution modeling、the data acquisition needs in model input and the computational platform needs. Furthermore、to meet the continuous challenge of both the scientific and legal advancement in the community、AQMC also serves as the forum for new ideas and cooperative endeavors for future Air Quality. AQMC、Taiwan supported in this project has been inaugurated for over four years. Six universities have been involved in hardware、software and data bank supporting tasks. Through the web site contents and online information retrieving services、AQMC has achieved its minimum function required by its goals. Both the reduction in task duplications and improvement in service and job quality are widely noticed by the community. The prospective of a final dynamic air quality managing system through the daily operation of AQMC is the consensus among the common participating members. According to the sixth and eighth terms in the air pollution control act、the sources applied to emit or change pollutant、which the quantity is larger than a certain value、have to demonstrate that their impact on air quality is below the tolerance values by air quality model. Therefore、air quality model become a necessary tool to determine the permit of stationary source. Besides、air quality model traditionally can be used on air quality management plan、air quality impact assessment、and state implement plan、and et al. The project of air quality modeling center is designed to support various air quality models in needs of regulation、administration、and development. The results are shown briefly as follows. (1) The standard procedure of air quality modeling including application、overall check、review committee、review、and determination、has been accomplished. (2) The software、hardware and database systems for air quality modeling and analysis are accomplished. Databases for emission data、air quality data and meteorological data are lasting to be expanded. (3) Taiwan Emission Database System (TEDS) for year 1996 to 2000 have been transformed for model usage and are available on web for download. Meteorological data for input in ISC was a link derived to EPA web where including 1999-2003 meteorological data for ISC、MM5 base case including、1999、2000、2003 about 12 cases for input in grid photochemical model. (4) Evaluation of long-term air quality impact assessment of future (2007&2011) new sources using air quality model in Kao-Kao-Ping and Yun-Chia-Nan air basins. The results can be used for making and adjustment control strategies to improve ozone air quality in Taiwan. (5) The Influence of Environmental impact assessment (EIA) new source have been evaluated and quantified for three months simulation using photochemical grid model.

allowed increment limit, control strategy, effective assessment, ozone