This study noted that the existing distinction between unemployment and employment based on wage workers does not accurately reveal the current state in the youth labor market. Therefore, this study discussed what the meaning of work and turnover experienced by young worker is, and qualitatively analyzed at what point the existing concept of ‘turnover’ does not fit in youth labor market policies. To this end, the youth labor market was analyzed through various empirical indicators, existing studies on youth turnover were discussed, and the case study was conducted on young workers who had experienced turnover under ambiguous employment relationships. As a result, young workers experienced turnover with ambiguous boundaries between voluntariness and involuntariness without unemployment insurance due to the precarious labor market structure. In addition, for young workers, turnover has been experienced by 'expanding' or 'reducing' the number of their jobs rather than moving from one workplace to another. At the time of transition, young workers were unclear whether their economic activities were in employment, job search or non-economic status. The dichotomous distinction between ‘fully employed’ and ‘fully unemployed,’ which presupposes the status of wage workers belonging to the workplace, and the policies based on it were not consistent with the way young workers work. Based on the results, this study derived policy implications for vocational education, unemployment insurance and unemployment assistance.