Research objective is to determine dependence of professional multidimensionality on the person'scognitive abilities, to develop an essence and a cognitive orientation of multidimensional thinking, to study cognitive opportunities of memory and attention. The leading method of research is the system analysis of essence of multidimensional thinking. In the work the theoretical materials about multidimensional thinking published in the press, results of the experimental studies connected with detection of functionality of memory, attention and thinking were used. The cognitive basis of professional multidimensionality is made by the multidimensional thinking directed to extraction of new meanings by simultaneous actualization and correlation of several local semantic spaces. Nizhnekamsk office of Gertsen university UNESCO department research associates under the leadership of the author of this article made a contribution to research of cognitive bases of multifunctionality, multitasking and integrity. The results received in article can be used forworking out the technology of the expert's professional self-development based on multidimensional thinking and the advanced cognitive abilities.