This article discusses the functional division that is used generally in the teaching of landscape design, and it is not to give a yes or no simply but makes analysis from the development of the era and cross disciplines, trying to avoid philosophical arguments but unable to get basis out of the philosophy.The author draw a conclusion at the end of the article, characteristics of the landscape are dynamic and open, to some considerations are necessary for the design.Function can not be divided mechanically, instead, attentions shall be paid to laws of activities of the people in space and time and rational arrangements shall be made to complete the task.