The article analyzes the influence of shareholders and management of Chinese listed companies on the accounting information quality according to their different ownership structures. Empirical evidence illustrates that,at the low level of share concentration,the power of management has negative effect on accounting stability,while the increase of the power of shareholders enhances accounting stability for non-listed state-owned enterprises. With medium level of share concentration,the power of shareholders demonstrates negative impait on accounting stability,but the power of management has no effect on accounting conservatism. Based on high level of share concentration,the power of shareholders throws negative influences on accounting conservatism,while with the improvement of the power of management,accounting conservatism increases. However,for state-owned listed companies,management power has no significant effect on conservatism regardless of the level of share concentration,while the power of shareholders has negative influence.