Due to the impact of COVID-19, consumption of seafood has decreased, and prices of seafood have also fallen significantly. In response, the Ministry of Oceans and Fisheries promoted the ‘Seafood Win-Win Discount Program’ to overcome sluggish consumption. The purpose of this study is to analyze the effects of promoting seafood consumption based on sales data of participants using difference in differences method. The study designates seafood as the treatment group and food and beverages as the control group. Two scenarios were developed, considering the data's time frame and reference points. As a result of the analysis, the Seafood Discount Program is evaluated to have significantly contributed to promoting seafood consumption. Although there were differences depending on the scenario, this program was confirmed to be at least 1.7 to 4.9 times more effective than the budget.