Aimed at the problem of multi-sensor information fusion expressed by interval-value Vague set

a new fusion method based on TOPSIS is proposed.The method defines the distance between interval-value Vague sets

the positive and negative ideal objects are given

and the distances between each object and positive

negative ideal objects are got.The fusion result is given by the relative approach degree of each object and positive ideal objects.The example analysis proves the effectiveness of the method.