It was a commonplace in the past for research on traditional Chinese law to rely on those lü-li and hui-dian which had been compiled by the central government of the Qing dynasty, as these official regulations were believed to be prevalently respected and practiced. However, these were mainly layouts designed by the central government to control the local bureaucrats; therefore, it is debatable whether they are able to accurately depict the actual proceedings in the trials that are carried out in local governments. This article explores the Tan-hsin Archives in depth and analyzes the different stages in the actual administration of trials, namely evaluating the degree of seriousness, selecting proper procedures and making final verdicts. The authors want to reconsider whether those provisions written in lü-li and hui-dian are adequate in providing us with a thorough understanding of the trials undertaken by local governments. It was found that when dealing with complaints brought by ordinary people, magistrates in the local governments in north Taiwan redress grievances of parties involved and maintain the social order by making verdicts which merely upheld the basic value and spirit prescribed in lü-li and huidian but perhaps not precisely in line with the provisions in these legal documents. Under this mechanism, official regulations such as lü-li and hui-dian were not the sole determinants in the proceedings; in fact, magistrates had their discretion in deciding whether these official regulations relating to the proceedings were to be abided by or not.