Environmental Impact Assessment （EIA） Act has been enforced since 1994. The purpose of the EIA system is to enforce developers to assess the potential impacts on the environment before deciding whether or not the development activities should go ahead. Taiwan EPA has legislated related regulations and directions for the EIA committee to consult during the review procedure. Nevertheless, the regulations and directions have been enforced for decades and are necessary to be revised. Therefore, during the operation period of this project, the related regulations and directions were compiled and conferences were held to collect suggestions from the EIA committe members. In conclusion, revisions on regulations for reviewing of environmental impact assessment and directions for procedure of environmental impact assessment review meetings were made to achieve the objective of improving the efficiency and the quality of EIA review operations.