The objective of this dissertation is to propose a self-assessment model for evaluating the sustainability performance of Centers for Diffusion of Science, Education and Culture (CDSEC), based on the Standard ABNT NBR ISO 9004:2010. The research seeks to demonstrate by a case study within the Fundação Planetário da Cidade do Rio de Janeiro (FPCRJ) that the self-assessment tool included in the in the referred standard (if adapted) can be effectively used for assessing management systems of CDSEC. This research can be considered applied, descriptive, and methodological. The methodology encompasses literature review and documentary research; development of a self-assessment model for evaluating organizational performance of CDSEC, from the perspective of corporate sustainability; application of the hierarchical analytical method to define the weights of the evaluation criteria; development of a case study within the FPCRJ for demonstrating the applicability of the purposed model; analysis and interpretation of the FPCRJ results; and formulation of conclusions and recommendations. The main result of this research is an innovative self-assessment model for evaluating performance of CDSEC, from the perspective of corporate sustainability, encompassing eight key elements and 40 detailed elements. Particularly, the results of the case study of the FPCRJ could demonstrate that the purposed model can be effectively used for assessing sustainability performance of CDSEC and allowed to identify improvement and innovation opportunities towards high performance of corporate sustainability.