The research featured peculiarities of the intellectual development of children with severe speech disorders. A set of experiments showed that such children have systemic underdevelopment of verbal and non-verbal functions. The empirical part of the research was based on two methods: a color version of Raven's Advanced Progressive Matrices Test and Wechsler’s Pre-School & Primary Scale of Intelligence in M. N. Ilyina’s adaptation. The data were analyzed with the help of statistical methods. The article focuses on the system of psychological and pedagogical conditions of the intellectual development of preschoolers in the conditions of preschool educational organizations. The authors consider the sensory education as the basis of intellectual development aimed primarily at the development of feelings and perceptions. The content of the intellectual education includes speech development, development of elementary mathematical concepts, and productive activities (construction, modeling, drawing, application), which are considered as significant aspects of intellectual education. The authors compiled, tested, and evaluated a program of intellectual development of senior preschool children with severe speech disorders. The program was based on didactic games.