The role of cutting fluid is significant for removing heat from machining zone, providing lubrication and chip removal process in the metal cutting operation. The green machining is achieved by using vegetable oil based minimum quantity lubrication (MQL) to reduce the environmental effect of cutting fluid. Adding nanoparticles on the base fluid of MQL system greatly improves the lubricating performance. In the current study, comprehensive review of various machining process under nanofluid MQL (NMQL) system has been discussed. To carry out the review, various studies on NMQL under four categories of machining process such as milling, grinding, turning and drilling in the recent four years have been considered. This article addresses the recent trends in the utilization of various nanoparticles and measuring the output performance parameters to the researchers on MQL system.