When it comes into the risk society, the modern criminal legislation activates and goes overflowing in respond to the demand of the society. What kind of role should the science of criminal law play? The common view takes that the crime is a kind of behavior which invades the legal interests (or causes the dangerousness of invading the legal interests). And the theory of legal interests is a kind of standard to examine the reasonable margin of criminal legislation. Then, What are the contents of the legal interests as a "protected object" in the criminal law? Does it means some interests or some conditions? Or is it the pre-legislative concept or the result of the positive law? So this paper comes from the view of the concept of legal interests to subdivide the structure of the dangerous criminals further.