When Edmund JoKing\'s masterpiece,"Other Schools and ours-Comparative Studies for Today" is used as an important curriculum resource in teacher education,"what King\'s comparative study methodology is" as a problem is put forward.

How to define the concept of public interests? How to regulate them in the code of civil law? How to avoid earning business interests with name of public interests? This paper interprets public interests with the visual angle of socialization of property, base of right and the method of comparison and review the counterpart of the draft of civil law and put forward some proposals for legislation.