This study aimed to identify the corporate value of ESG by verifying the effect of corporate ESG program activities on corporate brands. In this process, we focused on the effect of corporate communication on ESG activities. The role of communication is very important in the process of corporate ESG activities leading to brand assets. This is because only by eliciting trust and support from various publics surrounding the company through communication can it lead to the performance of enhancing corporate value. Hypotheses were established based on existing literature and a survey was conducted targeting 300 men and women in the general public. In this study, in order to measure corporate ESG communication elements, the OPDC (Organization-Public Dialogic Communication) model was centered on and the AAA model for enhancing corporate reputation was added. The results of the analysis showed that communication on corporate ESG activities had a significant effect on the public’s perception of corporate ESG activities and the public’s attitude toward ESG programs, which in turn had a significant effect on trust in the company and brand assets. In particular, the mediating effect of corporate trust was significantly verified in the impact of public attitude toward corporate ESG programs on corporate brand assets. The results of the analysis and theoretical and practical implications related to the effects of corporate ESG branding were presented together.