Supplier evaluation is the most vital action of supplier selection. Supplier evaluation data is divided into two kinds: the qualitative and the quantitative. In this study, it proposes through using mobile agent to obtain quantitative data from suppliers and expert rating methods to get qualitative data. To deal with the inconsistency of time period about getting these two types data, a new method is proposed to process the qualitative data by the establishment of information credibility about evaluation data. The obtained results show that the proposed method is well suited for supplier evaluation to shorten the evaluation cycle and enhance the timeliness.