In order to promote the validity of the study, the results are measured by two models (Dechow et al. model and Kasznik model) and the hypotheses are tested by multivariate linear regression model based on firm-year method. In general, results of hypothesis testing showed a weak yet significant inverse relationship between the weighted average cost of capital and discretionary accruals, and an insignificant correlation between the weighted average cost of capital and non-discretionary accruals in companies studied