"Hacker" is a note and everywhere in this network era, while most people are misunderstanding for the "Hacker". "Hacker" has its own unique connotation. In general, hacker is an attitude and it is said to be a concept of the existence as well. "Hacker" is the inevitable product of the computer age and the Internet era should considered as a free communication era, which pursued the spirit of "Sharing", "Freedom" as its excellent interpretation. "Work is life" ,"Money itself is worthless", as well as "The network environment should be free" are all the unique ethical pursuit of hackers.