This article presents the study an achievement motivation and psychological stability their impact on development of the personal cognitive abilities in students of pedagogical high school. The analysis of the results shows that steady cognitive interest forms a stable motivation. The students with expressed achievement motivation preferred to work under the conditions of maximum stimulation of the achievement motive and strived to search for more effective methods of problem solutions. The importance of this research consists in that the relation, revealed between achievement motivations and cognitive interest of the students in general mechanism of mental regulation of training and education allows a teacher to identify the reference points of psychological training and education regulation, to have a psychologically reasoned impact on formation and perspectives.