Abstract: Fluid inclusions, trapped in the ore and gangue minerals, are fossil fluids of ancient mineralized hydrothermal systems.Fluid inclusion data,including temperature,pressure,salinity,density,composition etc.,can be used as a constraint to help understanding the processes and environments of ore deposition.This paper reviews fluid inclusion data in mesothermal lode,epithermal,Carlin-type,porphyry and skarn gold deposits.Fluid inclusion petrography,homogenization temperature,decripitation temperature and composition,particularly gaseous composition,can be applied in both regional and local exploration programs for gold.