In software testing field, model-based testing technique is a prominent validation technique that assures the high performance and evaluation of the systems. It is proposed to replace the manual way by generating automatically test cases from requirements. From the fact to its high practical relevance, several approaches that support model-based testing technique have been proposed in academic and industrial research. Although, most of these approaches differ on several important points like the specification paradigm, the model used to design requirements but share common principal, common challenges and common characteristic that are inherited from the fundamental concepts of model-based testing technique. In this context, proposed through this study a meta-model that represents model-based testing concepts and characteristics in order to define the structure and entities that must take any new model-based testing approach.