This paper presents a comprehensive review of the latest progress in supercritical fluid technology and its implication for metallogenesis. In recent years, more and more researches have proved that fluids in the upper crust and mantle are in a supercritical state. The supercritical fluids show special physical and chemical properties, which could play an important role in metal enrichment and migration during metallogenesis. Theoretical study shows that large - scale metallogenesis occurs after disaggregation of supercritical fluids.