The Pax Romana period (27BC - 180) was a glorious period in all aspects of the Rome empire, the epitome of the typical monarchy in medieval Europe. Through a survey of the first 200-year events, we find that the Rome Empire under the rule of the emperors clearly demonstrated the nature of the slave-dominated monarchy that was clearly and firmly revealed. sure. The paper focuses on the concepts of the emperor's royal kingship, how to maintain and control the kingship, as well as building a unified empire of the Pax Romana period.