In order to find out how the company's ESG activities affect the company's employees, this study examines the relationship between the employees' perceptions of ESG activities, organizational trust, organizational identification, innovative behavior and organizational citizenship behavior. In addition, the mediating effect of organizational trust and organizational identification was confirmed in the relationship between perceptions of ESG activities, innovative behavior, and organizational citizenship behavior. As a result of the analysis, first, it was confirmed that the corporate employees' perceptions of ESG activities had a significant effect on organizational trust and organizational identification. Second, it was verified that organizational trust and organizational identification had a significant effect on employees’ innovative behavior and organizational citizenship behavior. Third, the mediating effect of organizational trust and organizational identification in the relationship between employees' perception of ESG activities, innovative behavior, and organizational citizenship behavior was verified. Through this study, it was verified that the higher the employee's perceptions of ESG activities of the incumbent company, the more positively their trust and identification with the company were affected. By empirically verifying the impact of employees' perceptions of ESG activities, I would like to suggest the importance of strengthening ESG activities, which has recently become a hot topic in management.