Starting by the economic benefits and reputations,based on the actuality,the article analyzes the risk prevention of construction engineering projects,quality management and progress control.

Study on Effectiveness of Precaution in International Environmental Law;

As the first binding multilateral environmental agreement on the international transport of GMOs,Cartagena Protocol on Biosafety not only asks the potential importing country to decide whether to permit the importation of the living modified organism on the basis of risk assessment,but incorporates in precaution.

We can use the theories of precautionary principle,ecological justice,.

Main content of ecological security are included but not limited to precautionary principle, full-process control, polluters-paying and beneficiary-compensating principle.

Research on the Precautionary Principle and Biosafety;

On the basis of advocating precautionary principle, information open and public participation principle, and international cooperation principle, this paper summarizes regulations about biological invasion in the international legal documents and puts forward some useful legislation advice to our country.

Development of that case concerning Gabcí kovo-Nagymaros Dam and the arbitrament conclusion and summary foundation,we think one hand we can promote Sustainable Development Principle and Precautionary Principle etc.