The objective of this work is to provide a literature survey on the research attempts made in the field of ejector refrigeration systems and the studies made on the ejector as a component. The review is to be structured four parts. In the first part, the focus is on the effect of different geometrical aspects affecting the performance of the ejector in terms of entertainment ratio, pressure ratio and other flow related features, where various geometrical aspects are reviewed including primary nozzle position, area ratio, mixing suction length. The second part is dedicated to reviewing the attempts made in proposing different mathematical models to investigate the behavior of the ejector. In addition, experimental flow visualization attempts are also presented. In the third part, the study focus is on the main ejector refrigeration systems proposed. Finally, the effect of using different working fluids on the performance of the ejector refrigeration system will be reviewed.