During the historic-philosophical analysis is found out, what exactlyI. Kant has divided spheres of knowledge, values and the estimations carried by it accordingly to gnoseology, ethics and an aesthetics.Thus, it is necessary to note, that I. Kant has not created the estimate-valuable theory and at all has not realized up to the end an essence of the problem put by it. Subtleties of the estimate-valuable theory its followers V. Windelband and H. Rickert have started to understand and comprehend all. However until now the problem of estimate is absorbed by a valuable problematic. Therefore the purpose of given clause – to lead a retrospective show of the philosophical analysis of an estimation as independent category.