Abstract: This study was carried out to assess the ability of extension system to accomplish supportive policies of sustainable agriculture as perceived by extension experts. A sample of 87 respondents was selected through simple random sampling technique and surveyed through a pre-designed questionnaire. Descriptive and inferential were used to analyze the date for drawing conclusion. The findings show that extension experts generally had a positive perception regarding the ability of extension system for the achievement of supportive policies of sustainable agriculture in Iran context. No significant differences between overall means of professionals` perceptions toward ability of extension system to achieve supportive policies of sustainable agriculture and their age, organizational position, years of experience or educational background were found. It is concluded that extension system had a more effective role to accomplish policies regarding the supporting local groups for community action.