The structure of the knowledge base of the research field “Mental and behavioral disorders in epilepsy” (MBDE) was proposed. The knowledge base represents a relationship of three sets: h28 diagnosesi $ h17 syndromesi $ h162 symptomsi: The MBDE basic knowledge is a set of 19 tables organized hierarchically in three levels, which integrated 5012 elements. Each element of the basic knowledge is an integer in the range [0, 10].figureFigure 1: The structure of the MBDE basic knowledge Based on this structure, the description by the numerical values of the MBDE research field was elaborated [1]. The MBDE knowledge base demonstrates the following advantages: - A better understanding of the mechanisms and the obtained MBDE remissions. - Transfer of experience obtained in MBDE remissions to other medical and research institutions. - Development of intelligent support systems for MBDE. - Training of specialists in medicine and computer science.