Abstract: Analyzes the bidding behavior on the basis of the theory of static game on which the information is incomplete and that of products' discrepancy, according to the typical static characteristics of game in the competitive bidding activities for a certain project. A gaming model is thus developed on the basis of Hotelling's location model of line segments, taking account of the discrepancy between products which are to be contracted by different bidders and the favoritism of bid inviter with the intention of expressing the bidding process more actual. Then, the way to design the bidding strategy for a bidder is given in case the information is either complete or incomplete, with a numerical example given to explain the algorithm and verify its validity.