【正文】 l smoothing technologies, construction of the project cost vague prediction model, and in accordance with the relevant information and statistics Information and experience to establish a framework structure, the parison works Construction Cost Management from the quantityone price plan model to price of separation volume model of the market, and gradually establish a market pricebased price formation mechanism, the price of the decision in the hands of the parties involved in the market, and ultimately the allocation of resources through the market in order to realize through the market mechanism to decide on project cost. This will standardize the construction marketpetitive behavior and the promotion of project bidding mechanisms play an important role in innovation. It can be said that the implementation of the project bill of quantities is a project cost management system in our country a big step forward, but also in China39。 construction project bidding and tendering process characteristics of human behavior is analyzed to reveal the bidder39。s Republic of China for bidders, bidding regulation, enterprise strictly, put forward to bidders professional requirements of project profile was illustrated. The practice of project bidding purpose is to market petition of openness, fairness and justice. However, due to the construction market development is not standard, management system and the experience of inadequate, architectural engineering bidding in concrete operation exist in ACTS of unfair petition, and some drawbacks. This obviously violate the bidding, the bidding process, and will lose its significance for other bidder fails to bid is unjust, disturbed the bidding (project contracting market economic order, for activities), this kind of behavior must be prohibited, only in this way can we make construction engineering petitive trading activity lawfully healthy. This subject will I learned and social practice, present situation and construction project bidding system is expounded, and the disadvantages of bidding for construction project with ACTS of unfair petition phenomenon and analysis of causes, and finally make corresponding preventive countermeasures. Construction cost management system, both theoretical discussion, but also need to practice innovation. Under the conditions of market economy, project cost management, petitive and orderly market for construction management services platform structures. In such a premise, the original scale and method of valuation is inappropriate, and this needs to be reformed and improved. The spirit of the government39。s Republic of China for bidders, bidding regulation, enterprise strictly, put forward to bidders professional requirements of project profile was illustrated. Nowadays in the engineering construction industry, the market which is characteristic for project bidding, has formed. The construction panies,which want to create good benefits, have to control their cost and improve management to enhance the capacity of adapting and peting in this market. This article focuses on how to decrease cost and increase ine so as to control the constructio n cost effectively. In building engineering bidding law enforcement and the practice of project construction supervision system on standardizing China39。s decisionmaking ability and courage are closely related. Bidding documents is the general programme and play book of the bidding activity through the process of bidding. The bidding documents will specify that How to conduct each bidding work, how to dispatch bidding documents, the requirements for tenderer,how to rate and decide bidding and the procedures of bidding. Therefore, the personnel who is respon