Carneades, the founder of the New-Academy, has a remarkable position in the history of academy scepticism. His school has the following three characteristics. First, Carneades pursued the truth for life. In particular, he acknowledged the convincing impression(pithane phantasia) for the possibility of daily life. Second, the uniqueness of the Carneades’ philosophy can be summarized in three ways. (1) The Carneades is ‘a mitigated skeptic’ that emphasizes the ‘the convincing impression’. (2) Carneades expanded the scepticism of inquiry into epistemology, natural philosophy, ethics, and theology. (3) Carneades criticized the theory of God in the Stoics. Third, Carneades understood the principle of suspension of judgement as the first principle of scepticism in two dimensions. On the one hand he explored the ability to act against the problem of apraxia(the argument of inaction) of the Stoics, and on the other hand, against their dogmatism, when the former is emphasized, the principle of suspension of judgement should be limitedly accepted. If the latter is emphasized, the principle of suspension of judgement should be emphasized consistently. In conclusion, Carneades innovated the academy scepticism and attempted to balance both theory and practice. In this respect, his scepticism is called a new philosophy.