The main purpose of this research is to discuss the contingent worker on the perception of reciprocal obligations between the employer and the employee, for the purpose of get more knowledge about it and improve the relationship between employer and employees. In-depth interviews and questionnaires are applied upon doing researches. The data were analyzed by using descriptive statistics, reliability analysis, T-Test and one-way ANOVA. According to the results of in-depth interview and questionnaire survey, this study present the major findings as follow: (1) As the content of psychological contract, the contingent worker believed that the employer should pay attention to four basic conditions: good welfare to and resources for the contingent worker to get work done, payment, employee-friendly attitude, and the appointment of task. There are still three aspects considered to be equally important: fitst of all, the contributions for the organizational profit and the promotion of self-competence; secondly, the high quality performance; finally, business security and peer relationship. (2) The psychological contract will be affected by the background and experiences of contingent worker, as well as the treatment to contingent worker of the employer.