"Praise" and "respect" are two important but distinctive ethical concepts in classical ethics, of which the differences and causes are vague when modern society is escaping from the nobleness and excellence. Through an analysis of Aristotle's The Nicomachean Ethics and Kant's Fundamental Principles of the Metaphysic of Morals, it points out that praise and respect have different subjects and working principles. In moral education, we should follow these discussions, distinguish two types of things, namely the things worthy to be praised and to be respected, and get out of errors in moral practice for the improvement of learners' cultivation.