The paper brings up a series of theses on Meng Haoran's poem canon history by reflecting on the interpretation and evaluation on Meng Haoran's poem in literary history and Tang poetry history. The theses focus on showing reception sights for reading Meng Haoran's poem by all the past dynasties' readers, analyzing and inducing the elements and conditions which conduce to Meng Haoran's poem canonization. The paper might provide the current research and book about "Tang poetry history" with reference knowledge. In methodology opinion, the research is necessary. The paper aims to discuss the first part of the series theses: The significance of Meng Haoran's poem in Tang Dynasty's poetics. It may be a reference for showing distinction between the Sung Dynasty to Ching Dynasty reader's opinions on receiving Meng Haoran's poem. In the approach, first, I explain the model and canon-to-be of Meng Haoran's poem in Tang Dynasty's poetics. Secondly I explain reception sights of Tang Dynasty's poetics on Meng Haoran's poem. Finally, I interpret the social conditions which conduce to Meng Haoran's poem canonization in Tang Dynasty with views of social-cultural relationship, popularity, communication.