This article is divided into the following five parts: 1. The purpose of philosophy is to develop rationality and pursue universality; 2. The three-fold meaning of philosophy of children: "Philosophy for Children", "Philosophy with Children", "Philosophy by Children"; 3. The role of imagination, according to Van Steenberghen's Epistemology pointed out that the role of imagination has three functions; 4. the meaning of imagination in Philosophy with Children, according to the three directions in the previous section; 5. Philosophy with Children does not only benefit children. This article aims to show that Philosophy with Children not only deals with philosophical topics developed by children, but in fact, through the exploration of Philosophy with Children, it also stimulates the development of adult philosophy.