The judge of South China Sea Arbitration Case is a crisis for the fisheries problem of SCS, but it is a chance too. The 1982 United Nations Convention on the Law of the Sea is not advantageous to the protection of fisheries resource of the South China Sea, so we need promoting the process of the rule of law under the frame of Convention. The construction of Soft Law and Hard Law in fishery co-management and joint-conservation of the South China Sea has something to do with characteristic of fishery resource, relating to the particularity of the South China Sea too. The construction does not promote sustainable development of fishery resource well and does not reflect material justice. Considering the tension between China and other countries of SCS, it is necessary for Mainland China and Taiwan to cooperate with each other to gain the right of speech through service, safeguard the sovereign rights of the South China Sea fishery resources. The cooperation of Soft Law and Hard Law in fishery co-management and joint-conservation of the South China Sea should be optimized for realizing the better balance of utilizing and protecting fisheries resource.