Abstract:Twelve sampling plots of wet - rice field were investigated of twelve households of Daka, Xishuangbanna, Yunnan. The results show that there are great discrepancies of plant species richness among different households. Furthermore, hierarchical agglomerative graphics of wet - rice field indicated that plant community similarities among different households are low. Meaning-while, according to the semi - structure interview of sampling households, the authors found that species economic value were dif-ferent from each household. Species - household curve that similar to area - species curve of wet - rice field showes the minimum sampling percentage were 19 based on the fit and assessment of model curve S = a + blnB. A list of plants found in sampling plots is attached.