The purpose of the study was to investigate the counseling effectiveness of the adolescence career group by meta-analysis. The analysis included 14 studies were reviewed by treatment, instruments, variables, and samplings. And the 14 studies adolescence career group counseling by experiment designs. The results were as follows: 1. The results of combined tests indicated the counseling effectiveness of the adolescence career group in improving the adolescence career problems. 2. The results of effect size indicated the middle on instant effect and the low on maintenance effect. 3. The intervening variables of the instant effectiveness on the adolescence career group counseling comprehend: the group members are heterogeneity, and the group-from is workshop. The study will discuss the discovery from above, and suggestions for future researches.