This study was carried out in a quonset type plastic covered unheated greenhouse on the lands of Atatürk Soil Water and Agricultural Meteorology Institute in Kırklareli. In the study, the effect of different salinity and water levels which were applied to broccoli plant, irrigated by drip irrigation in greenhouse, on energy use efficiency was evaluated and the optimum irrigation application was determined. In the research, ‘Ksonat F1’ type broccoli was grown as plant material. The trial was carried out on 36 parcels with three repetitions according to split parcels trial design and four different irrigation water salinity levels were on main parcels and three irrigation levels were on sub parcels. According to the results, the best result was obtained from T1S2 subject in terms of energy use efficiency. Energy output/input ratio, energy productivity and specific energy were found as 1.00, 0.54 kg/MJ and 1.86 MJ/kg from T1S2 subject, respectively. The salinity level was 0.38 ds/m on T1 subject and it was concluded that the optimum method should be on low salinity level and the irrigation water application should be on the level in order to bring the current moisture level to the field capacity.