| Summary: | 碩士 === 中國文化大學 === 國際企業管理研究所 === 95 === Enterprise Resources Planning (ERP) system is an optimized information man-agement system for integrated enterprise resources. Its main function is to improve the management performance of the enterprise via integrating and planning the resources of enterprise requirement. In recent years, many researches are focusing on the market re-action and performance to ERP system implementation announcements. Here, we ex-amine market reaction and performance of ERP implementation announcements in Tai-wan financial institution. In this paper, we find significantly positive market reac-tions to ERP implementation announcements of the public financial institutions in Tai-wan. On the other hand, this paper also examines the longitudinal impact of implemen-tation on public financial institutions business performance. As the results, they indicate the re-turn on equity and net profit margins are significantly better after the first year of the ERP system implementation. However, the business operation performance measure and productive ability measure indexes such as overdue loan ratio, assets turnover, de-posit growth rate, loan growth rate, staff average operating income, and return on assets are not improved over a 3-year period examined following the ERP implementa-tion.
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