Modern society is a risk society characterized by 'uncertainty'. The leaders in a risk society play an important role in maintaining order and safety. The leader's message in a risk situation has a positive effect on actions and motivation to protect citizens and contributes to the minimization of damage. In this study, under recognition of the importance of the leader's role in disaster safety, leaders' messages were investigated. For the purpose, a language-network analysis was performed on the speeches related to disaster and safety of recent Korean four presidents from the 16th to the 19th. The results are as follows: First, Korea's crisis management revealed in the President's speech reflects the situation at that time. Second, the speech contains the Presidents' political philosophy and values. Third, many of the words found in the speeches of the four Presidents show the governments' struggles to induce a higher level of safety behaviors and attitudes of citizens while giving highest priority to the safety of citizens.