This research includes investigations of the ocean water quality of Tainan, its contamination sources and examines its relations to the fishing industry. It also explores the connection between topographical changes and evolution of the Tainan fishing industry and by using relevant information of ocean weather, tidal waves, wind speed, wind direction, and typhoon to study its relatedness to the developments of the fishing industry. It will further look at the role of the government in pollution prevention measures of the ocean, which specific laws and regulations must be setup and put into motion, so it can have a key role and have authoritative power. The quality of the marine environment has obviously deteriorated as the economy developed, and public hazard signals should become a severe issue that the government should face. Marine biological resources are common assets of the humankind and it is closely related to human survival, therefore, marine ecosystem must be properly preserved so it can maintain its most natural state and its resources can be sustained for our next generation to enjoy. The conclusions of this research includes suggestions for planning marine contamination report system and advice the government to set up an award system to encourage local coastal residents and fishermen to establish marine patrol volunteer organizations and report immediately if they discover any oil contamination in the ocean. Also, to target the characteristic of fishing industry depending on natural resources, it offers a suggested direction for important policies of reinforcing environmental protection and resource preservation and recommends putting in as much protective reef as possible within 3 nautical miles, which are designed to stop trawling nets but does not damage fishing gears. It also advocates waste reduction and reuse of recycled items and by following the treatment method for sewage, if we can transform wastes into usable resources and naturally reduce the pressure of further treatments, the proper handling for marine wastes should be cautiously designed in order to directly and effectively resolve the problem of large amount of wastes. It calls upon the government to appropriately develop, use, and sustainably manage the rich marine resources that we possess. In addition to reinforcing marine-related laws and regulations (amendment), it also aims to strengthen the protection and management of marine territory, actively engage in related research and development of marine resource use to enhance the development of our nation¡¦s marine resources, the technology, and its standards. Finally, by investigating from a sustainable use of the ocean point of view, it is possible to explore new directions for the future developments of the fishing industry and propose possible development strategies, and by examining the current condition of Tainan's coastal fisheries resources, it offers relevant resource management plans for industry-related management units and businesses to take into consideration. Our nation has the ability and conditions to develop marine industry and under the demands of international competition and domestic development, a continuation for the marine industry development is of absolute importance and necessity.