Organic farming is the need of present scenario due to various reasons. The system of organic farming also promotes to sustainable agriculture. In this context an attempt has been made in this paper that agriculture in carried out mainly through three types of farming systems namely, natural farming system, inorganic farming system and organic farming system characterized by the different types of inputs and agricultural management by the different types of inputs and agricultural management practices used for cultivation of land and production of crops. The gross as well as net income or profit of different crops increased significantly by two to three times under organic farming system whereas they remained stagnant and even declined under inorganic farming system over the years. The costs of production of crops per hectare and per quintal under organic farming system are lower than under inorganic farming system. Gross and net incomes or profits are nearly 2 to 3 times higher under organic farming systems. Overall organic farming system produces more and sustainable agriculture output with less energy, low cost and fewer resources. Therefore, the quality and health-conscious people world over are now buying and consuming organic products at the premium prices which are 3 to 4 times higher than the ordinary produce, produced under inorganic farming system. The organic farming system is being followed by our farmers from centuries. The government policies in India should be aimed at boosting organic farming on a large scale for export of organic products. Key words: organic farming, sustainable agriculture, food security