摘要：文章针对现行招投标体制下如何有效控制工程造价进行分析，并且提出了一些具体措施。
Abstract: this paper discusses the current bidding system, how to effectively control engineering cost analysis, and puts forward some concrete measures.
利用群签名体制给出一个可撤消投标者的安全的网上招投标方案。
This paper utilizes a group signature scheme to propose a secure scheme of bidding and tendering on Internet with revocation of bidder.
但由于当时水利工程管理体制的落后及建筑市场的不规范，在进度控制、运行管理、招投标等方面存在一些问题。
However, owing to the outdated project management system and nonstandard architectural market, there exist some problems such as schedule control, operation management and bidding, etc.
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