This study aimed to propose a direction for the cold chain operation of fishery wholesale markets by installing temperature and humidity measurement devices within the market. The spatial scope of the study was the Boryeong Fisheries Cooperative Wholesale Market, and the temporal scope covered temperature measurements taken at 10-minute intervals over 24 hours from August 15 to December 13, 2024. The analysis revealed that the internal temperature of the wholesale market exhibited seasonal characteristics, allowing classification into three groups: a high-temperature summer group with an average temperature of 26.9°C, a stable autumn group with an average temperature of 17.4°C, and a low-temperature winter group with an average temperature of 8.14°C. Additionally, when examined in three-hour intervals, the difference between the highest and lowest temperatures ranged from a minimum of 5°C to a maximum of 13°C. These findings suggest that the internal temperature of the wholesale market reflects seasonal patterns, indicating a need for operational staff to implement low-temperature management manuals tailored to each season. Given that fisheries cooperatives operate the wholesale market, improving the temperature management manuals of the cooperatives and establishing standardized seasonal temperature management guidelines are necessary.