Shui-Jing-Zhu, an ancient book written by Li Daoyuan more than 1400 years ago, is a famous masterpiece. There are about 15 thousands place-names in this book. It not only cited some important opinions of toponomy, but also summed up a series of brilliant principles about place naming and place-name's change. Some principles were very close to modern toponymical theory. It explained the derivation of 1052 place-names, and this achievement surpassed one thousand for the first time in Chinese history. These explanations can be classified into:physiographical place-name and human geographical one. Physiographical place-name included 10 types, such as Yin Shui Wei Ming (naming according to river's name), Yin Shan Wei Ming (naming according to mountain's name), etc. Human geographical place-name included 14 types, such as Ren Wu Di Ming (naming after people), Shi Ji Di Ming (naming in the light of historical relics), etc. This book corrected some current wrong ideas about place-name. It had special and professional views about pictophonetic characters of place-name, too. Furthermore, this book quoted plentiful toponymical document, showed the feature of China's traditional toponomasiology and made this subject developed greatly. In a word, it is one of the most important works in the history of China's toponomasiology.