Background and Aim: Content analysis of scientific journals is a good way for becoming aware about the evolutionary flow of research strategies and data collection techniques used researchers in different fields. The purpose of this study is to investigate the content analysis of research strategies and data collection techniques used in Iranian Knowledge and information science Journals.

Materials and Methods: This study was conducted by content analysis method. The data collection tool was checklist and document observation. The study population included 943 articles published in Iranian Knowledge and Information Science journals. Data import to SPSS software and analysis by descriptive statistics and Chi-square formula.

 Findings: Literature review method was the most popular, used by 42.71% of Iranian researchers. The second most popular Iranian research method was survey method at 37.63%. Iranian articles were used a few number of other methods such as Field Research (0.20%), Information systems design (0.20%), or experimental research (1/20%). The leading technique was document observation, with about a half of the total (50.44%). The other prominent technique with 25.36% was questionnaire-distributing. Chi-square shows the meaningful difference between scientific journals based on research methods and data collections techniques.

Conclusion: Study of published articles showed that asymmetric distribution of research methods and data collection techniques used in knowledge and information science field.