The purposes of this study are to analyse operating systems of inmate's vocational education and training program and to suggest more effective methods in improving quality of vocational education and training. The vocational education and training should be carried out to meet the diverse educational needs of inmates through academic and transitional services whereby inmates can successfully integrate into society. In addition, inmates can secure employment and become responsible citizen through education and training so that reduce possibility of the repetition of an offense. Current education and training program are analysed from the viewpoints of curriculum, operating body, selection method of trainee and evaluation process. To improve quality of education and training, curricula need to be diversified and specialized. The correctional education should be recognized as a progressive and effective education system that provides inmates with socially acceptable skills and transferrable to the society. In addition, ways to establish in connecting various training organizations, in selecting trainees, in developing teaching methods are suggested. The importance of developing evaluation tools and employment services and institutional repletion are emphasized and new details are suggested.