Abstract: The primary purpose of this research was to identify extension methods and organizational characteristics for supporting Sustainable Water Resource Management (SWRM) in agriculture of Iran. The total population of agricultural extension experts (N = 110) of Agricultural-Jihad Organization of Khuzestan Province of Iran considered as population of study. A mailed questionnaire was used to collect the data. The response rate of questionnaire was 78% (N = 86). Appropriate descriptive statistics such as mean scores, standard deviations and correlation coefficient were used. The findings show that extension experts had positive perceptions about SWRM in agriculture. Extension experts believed that among extension methods, on-farm education, problem solving methods and workshop had very high importance for supporting SWRM in agriculture. Also, ranking based on the perceptions of extension experts indicated that the three most important organizational characteristics of extension system for supporting SWRM in agriculture were: considering local groups, participatory management and considering job qualification. It is concluded that appropriate extension methods and organizational characteristics for supporting SWRM needs to be accurately implemented for the extension system development.