Right of subrogation in insurance law is main content of subrogation rule derived from principle of indemnity,it is legal and accessorial creditor s right owned by insurer against the third party who takes the responsibility to insurance accident,but not insurant.

The Insurer s Non-Recovery Defenses Based on the Principle of Indemnity: A Discussion under Inshore and Freshwater Hull Clauses;

It is based on the principle of indemnity, but its functions are far beyond to prevent the insured to obtain the profits which exceed his actual loss and to avoid the occurrence of moral hazard.

In the consideration of the nature of the loss, the indemnity principle is suitable to the material loss which could be measurable by the money, while the payment principle to the abstract loss which could not be measurable by the money.

Currently, to construct the loss compensation system in administrative plan and better the remedy system of administrative plan are the main ways to improve the protection of private interest.

Educational equity contains three rational principles of educational resources allocation,namely equality principle,difference principle and compensation principle.

After analyzing the research progress in terms of the fundamental theory and compensation principle,the authors determines the basic elements of ecological regulation compensation,for a study case of Yinma River basin,which include compensation body,compensation objects,compensation standards and guarantee measures.