PengHu has development history over 700 years, and original plants on islands cannot be seen due to pioneer’s reclamation and wood cutting, and hard to be traced in absence of documentation and record.  Limited by natural environments, PengHu is not such a pleasant place as Taiwan for multiple plants’ growing.  In PengHu, most 400 kinds of plants are herbal, and tall bushes and arbors are planted in gardens or as road tress or wind breaks.  For less vertical distribution and multiplicity of plant in PengHu, non-vascular plants, such as alga, eubacteria, and lichen, are seldom seen; ferns appear less; gymnosperms are human planted; and angiosperms are scattered all over islands as strong species.   For restricted growing space, plants are different in scattering area, growing environment, land gradient, and structure.  The Book divides country plants in PengHu into wild cluster society (such as plants in intertidal zone, in coral zone, in sand beach, in sand lands, on grass land, in wetland, and woody plants), and special plants (such as special species, rare species, parasite, ferns, and red forest), and includes some introductory contents about characters and scatterings for plants often seen, but not too much in limited pages.  The goal set by the Book is to get people aware of country plants, and further cherish them.