The aim of the article is to research human relationships in Sung society on the processes of ”writing epitaphs” (撰銘) and ”asking someone to write epitaphs” (請銘) before departed die. The article surveys relationship of departed through the description of epitaphs. ”Asking someone to write epitaphs” is the preparatory assignment of whole writing activity. In fact, the reason and process of the preparatory assignment comprehend more concrete and reliable material. When people in Sung dynasty confront the crux of doomsday, their behavior frequently responds their most important feelings and relationships each other. Sometimes the most important feeling and relationship are between departed and writer, asker and writer, even departed and asker. We could comprehend that the complicated relationship responds the order and construction of society. The standpoint stresses the social function of epitaphs and improves religious function. The descriptions epitaphs not only comprehend culture of funeral but also show the order of relationships in the society.