The plan will be included in a military reform package to be presented to President Lee Myung-Bak, a defence ministry spokesman told AFP.
South Korea's military computer networks are under ever-growing cyber attack.
The South's military security unit said in a report last month that every day the military counters an average of 10,450 hacking attempts and 81,700 computer virus infections.
Experts say South Korea -- one of the world's most wired societies -- needs an integrated unit to fight cyber attacks by North Korea and China, which run elite hacker units.
In 2004 hackers based in China used information-stealing viruses to break into the computer systems of Seoul government agencies.
Last year South Korean Prime Minister Han Seung-Soo warned his cabinet against what he said were attempts by Chinese and North Korean computer hackers to obtain state secrets.
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