The transparency principle is one of WTO’s basic principles, and it plays an important role in maintaining predictability and stability of world trade. The thesis first explains the causes for the transparency principle and the two key points of it -- the publication and notification of trade policy. Then it analyzes the cause of the existence of serious problems when members of WTO are performing their duties. The thesis offers suggestions on improving the transparency procedure and promoting its members to comply with the transparency obligations. The last part the thesis analyzes on how to improve our government’s transparency, including the commitments that our country makes, the problems when our country are performing the duties and the suggestion of improving government’s transparency which including improving the transparency of government’s administrative legislates, making administrative procedure law and law for disclosing government’s message, and perfecting the judicial review.