The modern world causes increased pollution and environmental problems and governments and organization‘s concerns about the environment. One of the major steps to improve environment is adoption of environmental management standard (ISO 14001) in the organization. Evidence shows in spite of the adoption of environmental management system in most organizations, the successful implementation of laws and regulations of ISO 14001 is different. Thus this study aimed to investigate the factors effecting on the success of the implementation of environmental management systems in ceramic and tile industry in Yazd province. These factors have been classified in three groups such as management elements, organizational culture and financial and nonfinancial resources. Then we compared the accuracy of the SEM and ANFIS in forecasting the success of the implementation of environmental management systems. The result showed that managerial elements, organizational culture and the resources have significant effect on success of the implementation of environmental management systems (respectively 0.50, 0.25 and 0.22). Finally all of the factors that effect on EMS were ranked based on impact factors.