The ascertainment of tender cost price in combination with the practical case of Huizhou hydroelectricity construction engineering Ltd. Inc. Guangdong was analyzed.

The bidder should ratify the cost, institute reasonable tender price and make the quoted price more persuasive so as to win the bidding in the tender competition of construction.

The certainty model of the risk of tender for engineering construction, bid cost comparison and tender probability on uncertainty measure is established.