The seashore marine water quality of the area northern Zheng-yen River basin was investigated, investigation area ranged from the north side of Ba-Zhang River estuary to the south side of Wang-Zi-Liao Sandbank in Tainan County. In comparison with Environmental Protection Agency’s marine water quality standards (Class A), the 3 monitoring results indicate that the water quality is within the standards. The first two monitoring results show that 100% of the water index concentrations are within standards. The third monitoring results show that 98% of the water index concentrations are within standards. In addition, over the years the concentrations of the total phosphorus are in the decline. In comparison with international water quality standards (NOAA), the results show that the majority of heavy mental concentrations are lower than TEL (Threshold Level). All the concentration fluctuations of Copper is lower than TEL. The levels should not cause harm to eco-system. The Nickel level has exceeded TEL standard, but is lower than ERL (Lower threshold, 20.9mg/kg). Nickel concentration detected here shows 16.9 mg/kg, in comparison with the detected Nickel concentrations from other regions, such as Qi-Gu sediment (45 mg/kg), Dan-shui sediment (55 mg/kg), Koahsiung harbor sediment (59 mg/kg), Jia-yi sediment (32 mg/kg), our results indicated better marine water quality. In comparison with Environmental Protection Agency’s marine water quality standards (Class A), our 9 monitoring results of water quality in the natural habitats of Black-faced Spoonbill indicate that the concentrations of DO, N-NH3,SS have improved. The BOD levels of this region mostly surpass marine water quality standards (Class A), it might be due to the overly populated fishery industries. As for the marine petro leakage incidents, following cleanup and the effective and complete handling at the early possible moments were all properly done, All this can be taken as the examples of further similar incidents. For assisting Tainan County marine pollution prevention, our team assisted in the checking of ports and the ships, 708 cases were completed. Only around 33% of the cases turned out to be some pollution events, they are random floating oil and trash problems. In addition, we helped to organize marine pollution prevention info. sessions, which included organizing activities and printing pamphlets.