This paper is the compared analysis of on the young and old generations. It is focused on the achievement motivations and job characteristics of which influenced on job involvement. As the times changed, people were born on different backgrounds that cause a discrepancy in values and specialities of each generation. This paper is hypothesized the worker¡¦s hard-working level is different when with different achievement motivation and different job characteristics. The sample consisted of the workers in business or government organizations. All data collected and tested by the statistical methods with factor analysis, independent-sample t test, analysis of variance, regression analysis, and hierarchical regression. Conclusions and suggestion are based with the analysis results. Firstly, some significant differences had been found among different personal variables analysis. Secondly, the independent variable and dependent variable were found a significant difference that they to be interrelated. Finally, the interference effects of achievement motivation and job characteristics on job promise among the young and the old generations. Parts of all hypotheses were found, but there are only partially effects upon interference analysis. This paper aimed at workers of the young and the old generations compared analysis for an integrated conclusion of which offers the best practice reference.

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