Two field experiments were conducted at Wadi El-Natrun  EL- Beheira governorate, Egypt during the two growing seasons of  2014/2015 and 2015/2016 to study the effect of water stress (60%, 80% and 100% from irrigation water requirements), two organic fertilization levels (zero and 6 ton compost/fed) and three nitrogen fertilization rates (60, 90 and 120 kg N/fed) on growth, yield and quality of sugar beet plants grown under conditions of drip and sprinkler irrigation systems. Results revealed that drip irrigated sugar beet plants with 80% of irrigation water requirements (IWR) recorded the highest significant leaf area index, sucrose%, purity% and extractable sugar% in both seasons and white sugar yield in the second season only, while application of sprinkler irrigation at 100% of IWR gave the heaviest root weight, root number/fed, purity%, root yield in both seasons. Applying of 6 ton/fed compost with sprinkler irrigation significantly increased root weight, root number and root yield in both seasons. Also, application of compost at 6 ton/fed with drip irrigation system increased root yield. Increasing N level up to 120 kg N/fed significantly increased LAI, root weight, root number/fed and impurities % as well as root yield in both seasons and white sugar yield only in the first one. Excessive N application lowered beet quality in terms of sucrose, purity and extractable sugar percentages in both seasons. The minimum value of net profit was yield and quality  resulted from drip irrigation system with 80% water regime, 6ton/fed compost and 90 kg N/fed during 2014/15 season, while the maximum value of net profit was L.E. 7688 .10 fed resulted from  drip irrigation system with 80% water regime 6 t/fed compost 90 kg N/fed during 2014-2015 season ,while the minimum value of net profit was L.E. 2231.88 /fed resulted from sprinkler irrigation with 60% water regime, 6ton/fed compost and 120 kg N/fed during season 2015/2016. Data indicated that  using of drip irrigation system with 1322 m³ water/fed (60% of the calculated water requirements) + 6 ton/fed compost + 120 kg N/fed of ammonium nitrate (33.5%)  for the best results of yield and quality with sugar beet crop .So recommended that using of   drip irrigation system with 1322 m³ water/fed (60% of the calculated water requirements) + 6 ton/fed compost + 120 kg N/fed of ammonium nitrate (33.5%)  for the best yield and quality with sugar beet crop at the same Wadi El-Natrun condition, Egypt.