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The aim of this research is to recognize earnings management of the firms listed in Tehran Stock Exchange using changes in asset turnover (ATO) and profit margin (PM). ATO/PM model and Jones adjusted abnormal accruals model have been used to recognize upward and downward earnings management. Statistical population contains 133 firms during 2004-2011. The correlations tests, the mean equality tests such as t-student & Welch, and also panel/pooled regression models have been used to test the research hypotheses. Findings indicate that contemporaneous increases in PM and decreases in ATO cannot be as a recognizer of upward earnings management, and also contemporaneous decreases in PM and increases in ATO cannot be as a recognizer of downward earnings management. Also, results show that Jones adjusted abnormal accruals  model as compared to ATO/PM model has incremental and greater relative information content in recognition of earnings management.