Abstract: Environmental quality is an important issue in Xiamen as a livable and coastal tourist city. Since the Fukushima nuclear accident and the successive operations of the nuclear power plants in Fujian Province, the potential risk of nuclear pollution in the waters adjacent to Xiamen has attracted the attention of public and government. In this study, the levels of main radionuclides in seawater and marine sediments in 2015 as well as the environmental radioactive quality were studied in the sea area around xiamen. The results showed that the concentrations (activities) of total uranium, ⁹⁰Sr, ²²⁶Ra and ¹³⁷ Cs in seawater were within the range of normal marine radioactive levels, and there were no significant seasonal differences. The artificial radionuclides ⁵⁸Co, ⁶⁰Co, ¹³⁴Cs, ^110mAg, ⁵⁹Fe and ¹³⁴Cs in seawater were under-detectable. The highest activities of ⁹⁰Sr and ¹³⁷Cs in seawater were far below the corresponding limits of national Sea Water Quality Standard. The activitiy levels of radionuclides in marine sediments were also in the range of normal marine radioactivity levels. Used the current method of marine radioactive environmental quality assessment set up by our laboratory, the radioactive environmental quality was classified. The results showed that radioactive environmental quality of the sea water in the study sea area was at Grade 2 and that of the marine sediments was at Grade 1, which were at the safety levels. Thus, there was not observable sign of radioactivity contamination in the waters around Xiamen in 2015.