It's important to definite the position of legal systems’ construction for China’s nuclear safety law and then logically develop those legal systems .The legal systems’ position includes objectives and legal subjects. The former can be divided into the stage of preventing accident and the stage of alleviating the consequence of accident; the latter’s purpose is to provide the licensee’s safety management obligation, the government or the regulatory body’s functions and responsibilities, and the public’s right to know and participate. The legal systems’ development of the nuclear safety law legislation can use the objectives and the legal subjects as vertical axis and the horizontal axis, and in way of referencing to foreign experience based on China’s own practice.