Purpose: The present study was conducted with the aim of evaluating the applicability of the comprehensive financial system of Tehran Municipality with the principles of ISO 9241-10 standard. For a comparative study of usability, the effect of four factors (organizational unit, Place of employment of deputy controllers 2, education and field of study) on users' understanding of the usability of Tehran Municipality's comprehensive financial system has been used.
Methodology: Data collection was done using ISO 9241-10 standard questionnaire. Data analysis was done by using SPSS version 20 software and by performing Kolmograph Smirnov tests and analysis of variance.
Results: The findings of the research show that three factors (organizational unit, level of education, and field of study) have a significant effect on users' understanding of the usability of the comprehensive financial system of Tehran Municipality, and there is an effect between the Place of employment of deputy controllers 2 and the perception of the usability of the comprehensive financial system of Tehran Municipality. There is no meaning.
Conclusion: In general, the results show that the evaluation of the users about the usability of the comprehensive financial system of Tehran Municipality according to the ISO 9241-10 standard is not the same and needs more attention on the tastes and needs of the users, promotion, guidance, uniformity and uniformity of the system use in Various units of Tehran Municipality strengthen internal controls in organizations and affiliated companies of Tehran Municipality, providing timely support services and specialized training of subsystems to users.