Sinyugong-an, drawn up during Yeonsangun’s reign, was pointed out as the main cause of the evil of tribute during the 16th century. However, there is no research on the actual background, process, and characteristic of Sinyugong-an. The researcher examined the background and process of Sinyugong-an during Yeonsangun’s reign, characteristic of the relevant ordinance, and the evaluation of it during that period and later generations. As the result of examination, Sinyugong-an during Yeonsangun’s reign was a very rational public ordinance, and the evaluation on it was very positive during that period. However, revolution of tribute problem became as an issue of the government since the late 16th century, and Yi yi, who insisted on the issue, pointed out Sinyugong-an as the cause of the problem, in order to revise public ordinance and reform the system of tribute․ offering to the king. This seemed to be a political investigation to accomplish his insistence, rather than the result of investigation of concrete content of public ordinance. The image of Sinyugong-an, created based on Yi yi’s opinion during the late 16th century, influenced the researchers of later generations and today, accordingly, Sinyugong-an, the output of maladministration(弊政) during Yeonsangun’s reign, eventually came to be pointed out as the cause of the evil of tribute during the 16th century. This research intended to investigate the content and characteristics of Sinyugong-an, beyond such image.