This study proposes the Analytic Hierarchy Process (AHP) integrated TOPSIS (Technique for order preference by similarity to ideal solution) as well as Fuzzy TOPSIS to assess the interior design diagrams. Six criteria to assess the interior design diagram are obtained firstly from the available references. One criterion is deleted using the Fuzzy Delphi Method through the results of experts' questionnaires. The present study indicates that the rankings order of interior design diagram assessment can be determined objectively by either the AHP integrated TOPSIS or the Fuzzy TOPSIS. The analysis procedure of Fuzzy TOPSIS is more complicate than that of AHP integrated TOPSIS. However, the work of experts' questionnaires of Fuzzy TOPSIS is much easier than those of AHP integrated TOPSIS.