Abstract: The group aggregation approach of interval number reciprocal compariso n matrix and interval number complementary comparison matrix are studied in this paper. First, some new concepts such as interval number reciprocal comparison m atrix,interval number complementary comparison matrix, consistent interval reciprocal comparison matrix and consistent interval complementary comparison matrix are defined. Then, according to the consistency of comparison matrix, some simple and practical linear programming models for aggregating interval number reciprocal comparison matrix and interval number complementary comparison matrix are established. Finally, a numerical example is provided to illustrate the developed models.