【正文】 ao a,*, Shuhua Wang b, Heng Li a aDepartment of Building and Real Estate, Hong Kong Polytechnic University, Hong Kong, China bState Key Laboratory of Novel Software Technology, Nanjing University, Nanjing 210093, China Abstract 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 construction cost effectively. bidding documents should be well formulated ,which is the improtment to a successful bidding and direct influence the success or failure of the bidding the success or failure of the bidding for the survival and development of enterprise has a direct impact, so we have a high quality, improve the bid documents of the unit, prevent invalid and successful pass mark appear, bee a research topic. [key] : bidding drawbacks of unfair petition countermeasures Bidding is a form of project transactions, project bidding process is to determine the successful bidder and the cost of the process and the price of the project, project bidding work of a very important link, do a good job bidding to determine the price, we can effectively control construction costs, and create a fair and equitable market environment, create orderly petition mechanism. Bidding in construction activities, construction enterprises in order to tender invincible works to be successful, And from the contracted projects profitable, it needs to integrate various subjective and objective conditions, the tender research strategy determine tender. Tender bidding strategy, including pricing strategies and skills. All of the strategies and skills from the numerous contractors bidding on the accumulated experience and objective understanding of the law and of the actual situation understanding, but also with the contractor39。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 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 are based on market economy mechanism, based on legal, scientific, fair, open and reasonable way to determine the winning bidder of an economic activity. Bidding is bidding activities constitute two basic aspects. The bidding activity is merely that by bidding to choose the one with the work Construction process capability, moderate cost, quality is excellent, short duration of construction enterprises, and this is the ultimate goal tender. I have participated in internships over the course of the project bidding, and pleted over part of the calculation of quantities, bined with graduate experience in the design process, a brief analysis of the mode Quantities Call for Tender The meaning of risk and risk characteristics of the general construction, the lowest price sealed bidding construction method produces several risks and incentives, according to their characteristics discussed the feasibility of risk control and prevention. Compa