Introduction: Inadequate knowledge of new approaches in research, as in qualitative research can lead to disuse or abuse. Therefore, introducing different aspects of qualitative and quantitative research can clear up The ambiguity surrounding them which would play an effective role in applying these methods in research. For these reasons, this study was conducted. The purpose was: introducing and comparing the features of qualitative and quantitative research in different aspects.

Methods: Library and electronic resources, correspondence with the international research organization was also another way for gathering information, and the relavant materials were selected After studying all materials the related content and information were selected.

Findings:qualitative research like quantitative is a precise method of survey. In the qualitative research, information about phenomena are presented in the form of explanation and description, even though in some cases statistics and numbers are used, the main goal of qualitative research is to develop synthesizing concepts and creating theory, while quantitative research tries to test a hypothesis. Data collection in qualitative research mainly include observation and interview, but, in spite of quantitative research, special strategies are used. Data analysis in qualitative research is inductive and in the quantitative research is diductive. Another major difference between these methods is about the role of researchers. The qualitative researchers are in close interaction with the participants, but quantitative researchers try to control and measure the variables. Sampling methods of these approaches also differ.

Results: Qualitative research is different from quantitative approaches from the point of view of the subject matter, goals and applications, data collection techniques, number of the samples, sampling procedure, and data analysis.