In recent years, the effect of corporate governance has been received great attention and highly controversial. The aim of this study is to explore the impact of corporate governance mechanism and firm characteristics on top manager turnover, firm value and financial performance. The sample consists of 170 companies in listed and OTC electric, electronic and high-technical industries for 2000 through 2003, including optic-electron industry, pc device industry, semiconductor industry, computer circuit industry, network instrument industry, IC design industry, computer service industry, PCB industry, connector industry, and passive device industry. The dependent variables in the model include corporate value creation index (Tobin’s Q), financial performance indexes (such as ROE, ROA, EPS), and odd ration of top manager turnover. On the other hand, financial leverage, R&D expense, the number of diversified companies, and firm age (working years) are considered as control variables. Corporate governance variables include board size, percentage of outside directors, information disclosure...