This research discussed rhetoric in Thai popular songs by interviewing the famous song composers and vocalist instructors and analysing the most 114 impressive songs selected by the listeners The researcher divided rhetoric in songs into 4 catagories using 4 of the 5 canons as the methodology : 1. invention which comprised content invention , types of themes and reasoning system; 2. disposition which refered to types of narrative, forms of poem, numbers of song's melody and numbers of hooks repeated; 3. style which covered parallel structers , repeated words, simile and symbolic using .antithesis and song climax; 4. delivery which was vocal and music expression. The song 's construction was explained by systems perspectives which emphasised that the whole system was more than the sum of the contributions of each individual part , Thus, songs would be determined as impressive not by words , melody or music arrangement individually , but also by the relation of each part to one another.
