A system and method for recommending a similar incident in operations technologies and a related device are provided. The method includes: obtaining alarm information of a to-be-processed incident; obtaining incident diagnosis information of M dimensions based on the alarm information, wherein the M dimensions include M different perspectives of incident diagnosis, and M is an integer greater than 1; performing processing based on the incident diagnosis information of the M dimensions, to obtain a feature of the to-be-processed incident; obtaining a plurality of similarity degrees through calculation based on the feature of the to-be-processed incident and features of a plurality of historical incidents, wherein the plurality of similarity degrees represent respective similarity degrees between the to-be-processed incident and the plurality of historical incidents; and obtaining a similar incident from the plurality of historical incidents through filtering based on the plurality of similarity degrees, and recommending the similar incident.