Ex-smoker belief continue smoking will get the chance of heart attacks and cancer, especially lung and mouth cancer will increase. The seriousness of this condition is death and family may lose who love, care and result in grief, pain and depression. They know perceive threat of disease and risk factors, and recognized further serious effect of body and relative about continuous smoking. Smoking cessation can reduce getting the cancer risk, alleviate of pain and reduce disease. Thus, overall life expectancy is also increased. However, stopping smoking is difficult for addict. It will bring excruciation, like anxious, insomnia, inability to concentrate. Also, they belief they can stop smoking easily. The perceived benefit, perceived barriers and self-efficacy will make them have expectation to perform behavior of smoking cessation. The cue to action is illness in internal and media, school and peer pressure in external. These make them perform smoking cessation.Ex-smoker belief continue smoking will get the chance of heart attacks and cancer, especially lung and mouth cancer will increase. The seriousness of this condition is death and family may lose who love, care and result in grief, pain and depression. They know perceive threat of disease and risk factors, and recognized further serious effect of body and relative about continuous smoking. Smoking cessation can reduce getting the cancer risk, alleviate of pain and reduce disease. Thus, overall life expectancy is also increased. However, stopping smoking is difficult for addict. It will bring excruciation, like anxious, insomnia, inability to concentrate. Also, they belief they can stop smoking easily. The perceived benefit, perceived barriers and self-efficacy will make them have expectation to perform behavior of smoking cessation. The cue to action is illness in internal and media, school and peer pressure in external. These make them perform smoking cessation.Ex-smoker belief continue smoking will get the...