The invention relates to a hierarchical clustering-based log audition method and device. The method comprises the following steps of: dividing a log into a first part and a second part; respectively determining vectors of the first part and the second part; and clustering the log by utilizing the vectors of the first part and the second part of the log so as to obtain a clustering result of the log, wherein the first part comprises attributes expressed by uniform structures in the log and the second part comprises attributes expressed by non-uniform structures in the log. According to the method and device provided by the invention, log audition is carried out by utilizing a hierarchical clustering method so as to carry out clustering on logs, so that abnormal log information in logs of people is mined.