According to his own words,his intentions were "coping with changes with justice" and "managing affairs with justice",that is,later kings should draw on the political ideas that had been proven successful and universal to cope with the complicated contemporary situations and benefit people.

Through microcosmic inspect and macroscopic research,the author finds out that it is an incident which was caused by personal emotion entanglement and then turned into one of a political struggle: Emperor GaoZong combined with Wu Ze-tian because of personal relationship;Queen Wang helped Emperor GaoZong to introduce Wu Ze-tian to enter the palace as a result of str.

The ideas include learning from the kings of recent antiquity, predicting the future according to the past and present similar situation, making detailed study on recent history but not neglecting remote antiquity, and ruling a country by propriety.