This paper advances a regression forecasting model of prevalence risk with fuzzy factors by means of statistic method and fuzzy mathematic method.

Routinized and Institutionalized Quality control for Medical Equipment can effectively improve the applied quality of medical equipment, lower patient risk related to medical equipment, it plays a very important role to improve the accuracy of medical diagnosis and treatment of the validity of the results.

Analysis of risk prevention of contractor s construction contract;

On risk preventions of enterprises running into debt;

Chinese enterprise overseas acquisition risk prevention s legal countermeasure;

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.