Recently, with the growth in the data industry, huge power consumption and carbon emissions of data center have become a crucial problem. A high temperature polymer electrolyte membrane fuel cell (HT-PEMFC) system with absorption refrigerator can be a solution because it supplies carbon-free electric power and cooling energy by driving the absorption refrigerator with HT-PEMFC waste heat. In this study, the coefficient of performance (COP) of a double-effect absorption refrigerator cycle have been analyzed, depending on the operating conditions of the data center and HT-PEMFC system. The COP of the absorption refrigerator has been obtained via simulations, depending on the cooling water, chilled water, and heat source temperatures. The results show that the higher the chilled water temperature and the lower the cooling water temperature, the higher a COP. In addition, when the heat source temperature is ≥165 ℃ and the cooling water temperature is ≤37 ℃, the COP of ≥1.15 can be obtained regardless of the chilled water temperatures.