Together with strong development of science and technology, survey equipments and analyzing tools for marine environment study have been significantly improved. This paper presents a recap about ability of applying numerical models and some resuls of the numerical models application on marine environment study in the Institute of Marine Environment and Resources. The results include those on hydrodynamics, sediment transport, pollutants spreading, water quality and ecology. Although the results are still limited, it is evident that the application of the numerical models significa.ntly contribute to the marine environment study.