Based on a sample of listed companies in Taiwan from 2000 to 2017, this study explores the extent to which companies that distribute cash dividends and corporate managers' different earnings management behaviors affect the firm value. Empirical findings show that, regardless of whether a company decides to issue cash dividends, the use of accrued-based earnings management has a significant positive impact on firm value, and the use of abnormal discretionary expense to adjust earnings has a significant negative impact. In addition, in order to understand whether different levels of cash dividend payout rates have asymmetric effects on different earnings management behaviors and firm value, a threshold model is used to test them. Empirical evidence shows that using accrued-based earnings management to adjust the level of dividend distribution has a threshold effect on firm value, and using real earnings management has a non-linear relationship with firm value.