In recent years, one of the most important developments which have been taking place in the primary school education system is the development of the qualitative-descriptive method of evaluating the students' achievements. The main goals of the qualitative-descriptive evaluation are improving the quality of learning and promoting the level of mental health in teaching-learning environments. Therefore, based on the the raised hypothesis, the purpose of this study is to investigate the teachers' perspecives regarding the descriptive and quantitative methods of evaluation.Using survey sampling method and multi-stage cluster sampling method, 30 teachers, teaching through the qualitative (descriptive) method in zone 1 of Tehran were selected. A questionnaire, developed by the researcher of this study, was used to compare the qualitative (descriptive) method of evaluation with quantitative evaluation method in order to explore the viewpoints of teachers.Using 1-sample sign test, the results revealed the positive view of teachers towards descriptive evaluation. From the perspective of teachers, quantitavie evaluation has had negative impacts on the mental health of families and students for years. Hence descriptive method of evaluation must match the content of textbooks and whatever the teacher has taught.