Abstract: In the paper, the author presents no matter what research fields or programs of sciences can't strengthen and succeed if it does not get the exchange of the energy, substance and information with other fields, so called "the Great System" of the world.As an example of Botanical Gardens, BGs, under the Chinese Academy of Sciences, the author show s, now, the target of BGs should be the research and experimental ground for the Plant Systematic and the Engineering and Technology.It is included the fields for carrying various disciplines of botanical research closely collabo rated with the institute of botany, especially researching the Biodiversity conservation, giving the popular education and teaching of Botany and Environment Sciences for the people.Besides, it is also the Ground for "Landscape Ecology" tourism for the community and gardening nursery for furnishing plant stocks for the people.The South China Botanical Garden, SCBG, is an important regional or national (some are international)comprehensive research and experimental ground for above mentioned fields, incl.the macro and microscopic aspects, theoretical and applied botany, and the valuable economic botany in the developments of regionalor local social economy and humanities, and the ground for conserving and cultivating the regional precious, rare, endangered and endemic plants, and to research the reasons of the endangerness and the factors of its disposition and to find the methods for propag ating them.It also researches the macro or micro regional environment protection, keeping there a green, beautified, purified and exquisite and ecobalance environment.Besides, it popularizes the education on Botany, Environment Science and its relation with other natural and social sciences, incl.patriotism education, and serving to the tourists with and exquisite and a health rest place.In the paper, the author give an "Addendum" that he is the only taxonomist in China to research Artemisia L.(Compositae), which was published in Fl.RPS.76(2), of China first.Later he got new energy, substance and information from "the Great System" inside and outside of China.Now the expanded the work, incl.Plant Taxonomy and Pharmaceutical Botany, also published book, titled A New Compendium of Materia Medica, in which more than 1, 700 medicinal plants were described according to the taxonomic system, and its uses among the people in China, and published other 24 cooperated books as one coauthor.Besides, 70 research articles and 60 popular papers were also published.In those papers, not only the Taxonomy, but also the speciation, evolution, floristic geography and uses of the genus, Artemisia L.with its allies, and even the family, Compositae in China and in the world were researched and discussed.

Key words: Botanical garden, Research and experimental ground, Plant systematic, Engineering and technology, Guidance significance, Great system