摘要
This paper made a comparison of Cicero’s Rhetoric with Baumgarten’s Aesthetics,for answering the question of how Baumgarten built the system of ars aesthetica on the basis of Cicero’s rhetoric.The paper demonstrated how Baumgarten’s key ideas of pulchritudo and magnitudo were related with Cicero’s decorum and modus concepts.Baumgarten’s magnitudo originated in Cicero’s modus.Baumgarten,however,differentiated the idea pulchritudo from the Cicero’s decorum for approaching the issue of pulchritudo ipsa.