Reservoir formation dynamic system is a new theory which is related to petroleum system. This paper comment on the appearance, research status and tendency of the system which is about the natural system of fluid movement in depositional basins. The dynamic mechanism of the system can be recognized by studying the basic condition and connectivity system of reservoir formation, and then the models of oil and gas' formation and enrichment regularity can be known. The studies of formation pressure, fluids dynamic mechanism, system classification and the geochemical effects of the superposed systems are made progress.
    The formation and evolution of the reservoir formation dynamic system in  different tectonic settings, depositional dynamics, thermodynamics, quantitative simulation, the formation and dissipation mechanism of abnormal formation pressureand its investigated and predicted methods are the major research subjects in future.