The major purpose of this study is to assess the perception of managers in the Forest, Range and Watershed Organization. It is an applied study by using descriptive–correlative method. A questionnaire was developed and data collected from 105 respondents. The validity and reliability of questionnaires was verified. The results of study show that there was a relationship between educational level, work experience, experiences in extension and education activities, role of extension in increasing information about sustainable forestry, create positive attitude, providing information about sustainable forestry indicators, motivation for participating in the projects, local management, allocation of appropriate financial resources, attend of extension education courses, participate in group discussions, visiting successful projects, using workshops, newsletters, magazines & bulletin and improvement of sustainable forestry management. Multivariate regression analysis shows that providing economic motivations of managers, being aware of indicators, using courses, management experiences & the role of extension in creating positive attitudes had positive impact on improvement of sustainable forestry sustainable management.