Structural operations in watersheds, particularly check dams, cost a lot. Therefore, it is important to evaluate their performances. To evaluate the performance of any project, we need some indicators that can evaluate the overall performance of the project by assessing them.  For evaluating of check dams' efficiency also need detailed indicators. Indicators rather than based on behavior of the nature, based on the efficiency of implemented measures. The purpose of this research is providing scientific and precise criteria for assessing overall efficiency of check dams and evaluating some series of check dams in Chaharmahal and Bakhtiary streams using these criteria. In this work 12 streams are selected with Gabions and Stone- mortar checkdams that are performed within 1986-2011 and have the most diversity in design, dimensions and catchment conditions. Then seven Criteria defined that affect group efficiency of check dams or relate to entire network like: spacing checkdams based on compensation gradient, type of check dam, use of existing material, minimal destroy in the site, fixed elevation of channel, coordination of reservoir volume with sediment  will deposited, and minimal flooded areas. Then, the score of any item in these criteria computed based on introduced formulas. Then all criteria weighted with paired comparisons questionnaire method. Finally using an optimized model in analytical hierarchy process, all understudy check-dams were assessed. Results showed that the criterion" spacing check-dams based on compensation gradient" weight: 0.297, and "type of check-dam" weight: 0.168, have the most effect on group efficiency of check-dams. Also, between studied waterways, series of checkdams in "Marghmalek" and "Sorkhkooh" despite of their simplicity and being small get the highest scores (80 %) and in fact had the best performance.