The project manager responsibility system which is an important result in modern management science has been degenerated into project manager contract system in most of construction enterprises in China.

Quantitative analysis on risk of project contracting based on fuzzy theory;

Taking improvement project for underground pipeline net construction in a city as example,the risk analysis is made for the integer process of the project contracting including the project biding,contract negotiation,project construction and project acceptance based on the Lifecycle Risk Management Theory.

Project management is the core of general contracting for constructional engineering project and such a management model is suited to socialist market economy.

This paper proceeds from management practice of construction spot in 8 large and mediumsized steel contracting project,which will benefit these people in charge of management organization of construction spot in contracting project.