Abstract: This paper establishes a MAGDM (multiple attribute group decision making) model for measuring software trustworthiness.Based on the establish software trustworthiness comprehensive evaluation index system,it respectively uses subjective weighting method for summarizing the group experts judgment and objective weighting method for modify group decision results.According to the distance between the measured software and the ideal software,we can rank software trustworthiness.Finally,applying the model to the development of a bank's online banking software trustworthiness assessment,the given example illustrates the specific process of MAGDM model,and the result show s the practicability and validity of the above model.