The highest rank among non-commissioned officers or noncommissioned officers in some countries. The United States, France, Germany, Japan, Hungary, Luxembourg, Peru, Chile, Venezuela and many other countries have this title, and some countries also divide the master sergeant into several grades. For example, the master sergeant in the United States includes the first master sergeant, the second master sergeant, and the third master sergeant. In addition, there are the chief master sergeant of military departments, military academies and troops at all levels, who are the general leaders of soldiers in various units and have a high status. The rank of Master Sergeant of the People's Liberation Army of China is awarded to soldiers who have passed the military training in military academies and have been appointed as the head of grass-roots administration or professional technology. From April 1993, the State Council and the Central Military Commission issued the decision to amend the Regulations on the Service of Soldiers in Active Service of the People's Liberation Army of China, the master sergeant is divided into four levels, the first level is junior, and can be promoted step by step according to the service years. The time limit for promotion from level 1 to level 2 and level 2 to level 3 is 4 years respectively, and the time limit for promotion from level 3 to level 4 is 5 years.

1999 The military service system reform stipulated that the rank of master sergeant should be abolished.