Sustainability evaluation of crop and dairy production system study was taken up in the Erode district of Tamil Nadu The turmeric and sugarcane registered higher productivity in crop production system and fodder sorghum registered higher productivity in dairy production system. Turmeric and foreign breed are more profitable in crop and dairy production system. In crop production system, the planting material, manures and fertilizer, irrigation and human labour were significant in turmeric production. In sugarcane production, planting material and irrigation were positively significant. In dairy production system, green fodder, dry fodder and human labor were significant in local breed. With respect to foreign breed, green fodder, dry fodder and concentrates were positively significant. The mean technical efficiency and scale efficiency of sugarcane and turmeric was almost similar in crop production system. In dairy production system, the mean technical efficiency and scale efficiency of foreign breed and and local breed was almost similar.Turmeric is more sustainable from input self-sufficient index and sugarcane is more sustainable from equity point of view.