The paper presents the results of determination of the weighing indicators of the features group associated with ergonomics and work safety of agricultural machinery ES (ergonomics and safety) in rating their global quality. The research was carried out on farm tractor, considered as energy farm machine. The experts recognize ergonomics and safety as important (14%), but not the most important characteristics of the four universal criteria of tractors. According to a group of selected experts (scientists, journalists and farmers) agricultural tractors should primarily be reliable (42%) and functional (38%). The same experts using the same method i.e. pair wise comparison method of Saaty, have determined an importance ranking of nine detailed criteria of ES characteristic. At this level of the hierarchy process the all of specific criteria ES1ES9 may be accepted as equally important in assessing the quality of agricultural tractors, which means that they have been well chosen.