Negotiorum management system is a typical embodiment of morality into the law. It takes the legal principle of "sanctity of private rights" and the moral principle of "advocating mutual assistance of human beings" as its standard base point. Since Roman law, the system has undergone changes, but its ultimate goal of achieving social harmony and legal justice has never changed. Because negotiorum management is caused by the fact that the manager acts unilaterally, the system design of negotiorum management focuses more on the regulation of the manager's behavior than other legal systems. It not only advocates helping others, but also prevents harming others, but also has more important moral significance and significance in this regard Real meaning.