【正文】 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。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, 3 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 decisionmaking ability and courage are closely related. Bidd ing 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 2 for tenderer,how to rate and decide bidding and the procedures of bidding. Therefore, the personnel who is responsible for prepare bidding documents should first have a general view of the bidding work, include all the requirements and arrangements into the bidding documents. If meet problems that have not been considered previously, then resolve them one by one during the preparation. The course of bidding documents preparation is also the course of making bidding scheme . In another respect, bidding documents is also the legal instuments. Besides relevant law and rules, the bidding documents are the mon game rules that bidder,bidding agent and tenderer should subject to through the bidding. Bidding documents are the legal instuments that all the three bidding related parties should subject to, have legal force, therefore, the bidding documents making personnel required to have the awareness and quality of leagal in order to reflect the fair, just and legal requirement in the bidding documents. In building engineering bidding law enforcement and the practice of project construction supervision system on standardizing China39。s construction market, improve the construction quality and played an active role. But in the process of implementing exist some disadvantages, needs to perfect, enrich and improve. This project bidding documents in accordance with the bidding law of the People39。s macro regulation and control, enterprise autonomy offer, the market will price principle, to implement the implementation specification bill of quantity. Inventory Valuation bidding activities a