From customs in the clan, village to customs outside the society, 'Vietnamese Customs' of scholar Phan Ke Binh is a complete set of records of the old Vietnamese customs. As a confucian scholar with advanced thought, the author not only describes each custom, but also the origin, the principle of the custom, evaluate to see if it is good or bad. So far, this nearly 100-year-old book is still one of the most valuable researches on customs and practices in our country, and many of the problems that Phan Ke Bing has referred to are still affect today's society.