［摘  要］  以合同法理为出发点，分析国际上有影响力的工程合同条件，得出现代工程施工合同条件变更应遵循定价在先、维持投标报价水平、公平计价原则的结论，并发现国内现行标准施工合同条件常常忽略这些原则，特别是没明确体现定价在先原则，应当加以改进。

［关键词］  变更计价； 施工合同条件； 定价在先； 公平计价

Abstract: Starting with jurisprudence of contract, analyzes the conditions of some influential international engineering contracts, obtains that valuation principle of contracts variation should include prepricing, keeping bidding level and fair valuation, and finds out chinas engineering contracts lose sight of these principle, especilly prepricing, so that should be improved.

Key words: variations valuation; project construction contract condition; prepricing; fair valuation

建筑经济，2012（11）：51-53