內命婦，係指皇后以外皇帝的妃嬪而言。中國歷代的後宮，以宋代最稱端肅，而宋朝的內命婦制度則沿革自唐代，共分五品二十五級，由於其身分特殊，又接近權力核心，在升妃進后的遷轉過程中，常伴隨權力鬥爭的發生。本文即由內命婦制度之發展著手，透過宋代各朝內命婦身分遷轉資料的收集與分析，歸納出以容德勝出、以色藝邀寵、生育皇嗣，甚或是上皇、太后屬意、臣僚干預等內外在的影響原因。

Both Internal and External Titled Madams are those concubines of emperors except their empresses. Concubines in Song dynasty are of high reputation in their decency as well as modesty in China history. The system of Internal Titled Madams in Song dynasty, which is originated from that of Tang dynasty, is divided into five grades and twenty-five ranks. The progresses in Titled Madams' statuses are often entangled with power struggle because of their close to the center of power. This study is designated to conduct an examination on the promotion and demotion of Internal Titled Madams' status in Song dynasty through collecting and analyzing verified documents. The author asserts that beautiful appearance, morality and conduct, giving birth to emperor's sons, preference of emperor's father or mother, and interference from subordinates are important factors in the promotion and demotion of Internal Titled Madams' Statuses.