Fluid inclusion is a key breakthrough in the study of geological fluids, especially ore- forming fluids in recent years, the related test technologies, methods and theoretical achievements are changing with each passing day. Based on fluid inclusions studying, not only the physical and chemical conditions of ore- forming fluids can be obtained, but also the source and composition of ore- forming materials can be traced, providing direct evidence for identifying deposit types and analyzing metallogenic models. In this paper, the research and development of fluid inclusions are comprehensively analyzed from seven aspects, including fluid inclusion lithofacies, uniform temperature and salinity, component analysis, pH test and calculation, PVTx equation of state, hydrothermal diamond cavity and its application in ore deposit. Firstly, the latest research progress and development trend of fluid inclusions in various aspects in recent years are systematically summarized, furthermore, the main problems existing in the composition test of fluid inclusions are analyzed, which provides a certain direction for its future development. Secondly, the characteristics of ore- forming fluids and fluid inclusions in various deposits are summarized, which has important guiding significance for analyzing the genetic types of deposits. Finally, the development direction of fluid inclusions in future ore deposit studies is summarized.