Bidding information is not all clear in the construction project bid evaluation.In order to eliminate the evaluation index to determine the weight of the subjective influence and select the mostclose to the owners of the ideal contractor bid unit,grey related degree model for engineering biddingevaluation was proposed based on the entropy weight.The index weight of evaluation index system wasdetermined by application of entropy method,grey correlation method was applied to determine contractors’ association degree between bidding units and the owner’s ideal.The great association degree indicatesthat bidding units is line with contracting business approach and the owners of the construction requirements.The results show that the combination of entropy weight correlation calculationis applied to the engineering bid evaluation,which makes evaluation result more objective,practicalfor the owners to demarcate mark and provides a quantitative basis for decision making,while it isbeneficial for the unit to choose reasonable contractors.