The present paper investigates the problem of mechanisms of the development of the effect of mental set, which is at the core of the processes of the implicit learning, development of the experience and solving creative tasks. As such mechanisms we investigate the change of the parameters of functioning of executive control and working memory subsystems. As a result of an experimental study, based on modified tasks by A. Luchins, it was found that mechanisms of the development of the effect of mental set have a systematic nature and include such factors as the change of the parameters of the executive functions and the specifics of the processing and storage of information in modality-specific blocks of the working memory. The role of the executive control is dual: it is necessary for keeping in the sphere of the attention the operations during their automatization, and at the same it, it makes the automatized scheme conscient by destructing the developed effect of the mental set. The executive control plays a role of the element which sets the structure of mechanisms of the development and overcoming of the mental set effect. Processes which proceed during the information processing in working memory subsystems also play an important role in the development of the mental set effect, however their nature requires supplementary research.