This study evaluates Hazard Analysis and Critical Control Point (HACCP) systems implemented on 25 broiler farms in Korea, thus enabling us to investigate the effects of such systems on broiler farm productivity. In addition, the reasons for, and the advantages of implementing HACCP systems on broiler farms are determined. These results showed that HACCP systems have a significant positive influence on the viability ratio and a negative monthly disinfectant fee on such farms. But the effect on monthly medicine fee was tended to be increased after HACCP implementation in broiler farm. The survey shows that the main reasons for implementing HACCP systems are hygiene and safe broiler production. The biggest advantage of an HACCP system is systemic farm management. Thus, HACCP systems can have positive effects on broiler farms by increasing productivity and improving systemic farm management. Furthermore, broiler farm HACCP systems might reduce food poisoning caused by chickens.