This article contains an analysis of the role of aesthetic evaluation of technical objects on the example of automation and dispatching systems. It is shown that the aesthetic value in scientific and technical knowledge, as in other types of knowledge, is not subjective. It has objective reasons which include unity, harmony of parts as a whole, simplicity, logical hardness and others.As a result, aesthetic evaluation can be used as a criterion for the effectiveness of engineering solutions and the functionality of technical systems.
Key words: technical system, functionality, usefulness, value, evaluation, beau ideal.