Abstract: We have built an efficient method to observe the stomata of monocotyledon by improving the traditional one. In this way, it is easy to distinguish the upper from the lower side of plant epidermis and pike a proper point precisely. Moreover, the new method is convenient with good credibility and stability. The stomatal parameter was gained exactly in this way in our experiment, which provides a certain reference for research of the botany and ecology.

Key words: monocotyledon, stoma, method improving