In this study, the effect of multiple intelligence theory (MIT) on the academic achievement was examined in the context of a multi-complementary approach (McA). It aimed to reach pre-complementary information by using meta-analytical and thematic examinations based on document analysis in the first stage of McA, which consists of using different analysis programs and of three basic stages. 63 studies examining the effect of the MIT were selected for meta-analytical research. Comprehensive Meta-Analysis and MetaWin programs were used for data analysis. In order to support the meta-analysis, a qualitative dimension including a detailed examination of the thematic aspects of the data was added to the first stage. The data was analyzed via the QSR-Nvivo-8.0 program in accordance with the case study design. In the second stage of the McA, an experimental dimension and the thematic analysis based on students’ views were conducted. The working group was selected from 12th grade high school students and the data obtained from them was considered to be post-complementary information. The process of combining the data in two stages was done in order to reach complementary information in the synthesis stage. The McA is expected to contribute to the extent and reliability of the research.