In the practice of public transport priority, according to different relation between government and public transport enterprise, this paper divided the type of local government\'s effects into three different pattern: public monopoly, deregulation and competitive tendering.

Aiming at the first-price-sealed bid problems in equipment acquisitions,the game characteristics of bid are analyzed,and the solution and expression of single-dimensional Bayesian equilibrium is presented.

The thesis systematicly analyzes the process of governmental competitive contract bidding, which expounds quite a few of ill phenomena and malpractices of bidding process by using economic language and principle, then puts forth many concrete measures of bidding and precaution.