Environmental Management System (EMS) studies conducted today are activities where enterprises plan, implement, control and monitor measures related to their activities that can impact the environment, and systematically and sustainably carry out activities aimed at preserving the environment. Given the limited resources of enterprises such as workforce, money, time, machinery and equipment, it is important for enterprises to prioritize their activities so that EMS’s work effectively. In this study, a list of environmental activities was primarily established with the aim of determining the EMS activities to be undertaken by enterprises or evaluating existing environmental activities. An approach for determining prioritized activities was developed from the created activity list according to the evaluation criteria appropriate to the operating conditions of enterprises.