BACKGROUND. To evaluate educational environment, it is important to use confidential and accepted tool. Dundee Ready Education Environment Measure (DREEM) (3) is a globally accepted and widely used tool to measure the education environment. Regular assessment of educational environment to evaluate teachers’ teaching method, students’ perception and their outcome and making the necessary adjustment to it is one of the factors affecting students’ knowledge, clinical practice and their motivation (4). In the MNUMS program, educational environmental assessment is one of the most important parts and we are unaware of any report of research work. Therefore, the researchers decide to carry this study. AIM OF THE STUDY. This study aimed to evaluate the educational environment in Nursing school of MNUMS using globally accepted DREEM Questionnaire. MATERIALS AND METHODS. This cross-sectional analytic study was carried out in Faculty of Nursing in Darkhan, Dornogobi and Gobi-Altai aimag out of 9 branch school of MNUMS during the academic year 2015-2016 and 2016-2017. DREEM questionnaire was used to collect data from 306 nursing students. RESULT. Most of the participants were female accounted around 89.9% (275) and male were 10.1% (31). By age, age of 17-19 were 25.5%(78), 20-22 were 52.0% (159), 23-25 were 15.0%(46), >26 were 7.5% (23). The mean item score was highest in Dornogobi school of 3.8 and lowest in Nursing school of 3.6. 4th year students’ 68.6% (210) agreed to “more on positive side” for their academic self perception and 22.5% (69) agreed “moving in right direction” for their academic self perception. All domains were statistically significant specially the perception of curriculum (0.854**) and perception of learning (0.803**) have high correlation. On the other hand, perception of educational atmosphere (0.444**) and perception of teachers have moderate correlation. The reliability of questionnaire was confirmed by Cronbach alpha and it is counted as reliable if it is more than 0.7. The perception of curriculum was relatively low in 2nd year students but higher in 3rd year students. The perception of educational atmosphere was relatively low in 4th year students but higher in 1st year students. CONCLUSION. The nursing school program is in same level. Students are satisfied with their academic self perception and perception of teachers. The result showed that 68.2% (209) of students consider positive aspect of educational environment (p<0.001). Students of all 4 school of MNUMS with same level of nursing school program are satisfied with their knowledge, clinical skills and educational atmosphere among the students. Dornogobi school students’ 65% assessed perception of teacher as “model instruction”.