In this study, irrigation evaluation of different cultivars of Rapeseed and barley in 2017-2018 crop year was performed in Sharifabad farm of Qamroud section of Qom. The result led to optimization of cultivation and improved productivity water is in two products, Brassica napus and barley. The Groundwater EC of this farm is salty. Due to the salinity tolerance threshold of barley, barley was predicted without yield reduction. But in canola crop due to less tolerance to salinity, crop reduction was predicted. During one crop season, Brassica napus was cultivated in eleven cultivars by irrigation method, the planting date started from October 26 to October 17, In tape irrigation, it was irrigated between 10 and 13 times. The objectives of this study were a case comparison between different cultivars of Brassica napus, both foreign and domestic, resistance of cultivars to cold and water consumption and productivity and yield and most importantly a comparison between irrigation methods in terms of water consumption and water efficiency. Meanwhile, Hayola Shirazi cultivar had the highest yield among all cultivars in the type irrigation system with the lowest water consumption. The efficiency of this figure is about 0.77 kg/m3 was calculated in the type irrigation method with water efficiency of 0.66 kg/m3 compared to gravity irrigation (surface) which has a productivity of 0.20 kg/m3. In hydroflow irrigation, it performed better than the previous two methods, but consumed more water (about 34.2%) than type irrigation. Regarding barley, it was cultivated in three cultivars and two types of irrigation methods, Fajr 30 cultivar increases water productivity by 2.2 by irrigating the type.