In this study, it is defined to treat the sources of work passion as independent variables and to treat organizational commitments as dependent variables. Based on the test samples of high-tech research and development engineers, it is intended to figure out the relationship between all variables and how they affect eath other. Futhermore, using person-organization fit and person-job fit as interference variables to study the interference among all variables. Totally 1,035 questionnaires are issued and get 642 valid copies returned. By using reliability analysis, factor analysis, on-way ANOVA, correlation analysis, multiple linear regression and hierarchical regression to analyze questionnaire data, the result is summarized as follows, 1.A positive relationship between the sources of work passion and organizational commitments. 2.The sources of work passion and organizational commitments differ significantly depending on personal attributes. 3.Person-organization fit and person-job fit interfere the relationship between the sources of work passion and organizational commitments.