Introduction: Web logs are the evident tools for the librarians. There are three main ways for applying web logs in librarianship fields, as follows: personal use by librarian to upgrade their personal information, as a source of information in case of libraries, and for their services. The aim of this research is to comparison between Iranian libraries and librarians, and superior librarianship web logs.

Methods: Present research has been achieved by descriptive method and comparatively studied a comparison between Iranian libraries and librarians, and superior librarianship web logs in 2006. Seventy- nine web logs from libraries and Iranian librarian and ten best librarianship web logs in the world in 2006 have been chosen as research community. We used direct observations and a check list -that its main factors came from Herring- and associated and based on observations and writer experiences, coaches' and weblog writers consultations for collecting data and comparing with the best weblogs, other subjects have been added in this check list including overall identifications factors, writers identifications , date , and the level of the weblog activities, technical aspect, overall concept, linkage conditions, and opinion have been showed. Collected data have been presented and analyzed using descriptive statistics method.

Results: In terms of type, it showed that 67% of Iranian web log are filtrated and 14% are scientific, Communicating services in terms of the librarianship and its news %18,coordination and similarity and communication between librarian and services performance %9 and publishing scientific information, papers and translations 9% are the main goal of the Iranian web logs. Evaluating different structural factors in Iranian librarian weblogs showed that in 40.5% of Iranian web log between 50% up to 75% of the writers identifications, 97.4% of them between 50% up to 75% of technical factors, 78.48% of Iranian weblog under 50% of overall technical factors, 64.55% of them under 50% overall containing, and 43.42% of them under 50% different type of the connections have been observed. In total 65.54% of the structural factors were in superior weblogs and 49.90% in Iranian web logs. 

Conclusion: Evaluation of the structural factors made the leveling Iranian librarian and libraries and superior libraries web logs based on gained scores. Iranian librarian group web logs achieved the first place by 80.95% points and non librarian web logs went down to 79 place by 17.26%based on structural factors among Iranian web logs. Between the superior web logs The Academic Librarian was in first place by 82.14% and the Conservator in 10th place by 29.76%points. Some 58.23% of Iranian and 20% of world's superior web logs managed the structural factors in this grading.