This study was conducted in two selected potential areas of South region in Wolayata and Gamo Zones of Ethiopia during 2016 and 2017 cropping seasons. The participatory grandmother and mother Trial methodology were for varietal evaluation and selection. The main objective of the study was to evaluate and select the best performing Mung bean varieties that meet farmers’ criteria using participatory varietal selection method in order to speed up their adoption. Five improved varieties were evaluated at the two districts on farmers’ fields. The farmers were involved in varietal selection process at maturity and harvest. Farmers classified the Mung bean varieties’ selection criteria according to their order of importance: uniform maturity, earliness, high yield, large seed size, large pod number, medium plant height and drought tolerance as 1st, to 7th, respectively. The most chosen varieties by farmers were Boreda-1, Rasa and Show a robit. In general, the high-yielding varieties Bored-1, Rasa, and showarobit had a yield advantage of 12.8% to 14.5 % over the grand mean, and other improved varieties included in the trial. Based on yield performances, farmers and breeders’ selections, those three varieties were selected and should be recommended in the study areas and similar agro ecology for wider dissemination and production.