With the rapid development of society, people get more and more like to show their personalities. Some people choose to tattoo their favorite patterns or the names of their loved ones on their bodies, but nothing always goes as planned. Some couples break up, so someone may hope to remove his or her tattoo to forget past times. Or someone not satisfied or changed his mind for the pattern that tattooed, they also need to remove and tattoo a new one. So Pico machines emerge as the times require them to solve the above issues.