The major purpose of study is to know the main human resource function role which is performed currently by the subsidiary of Multinational Corporation (MNC) in Taiwan and the concept of multiple-role model is adopted in the study. This study is done by the quantative survey to find out the factors which could influence the human resource function role and the current multiple-role model, meanwhile the cluster analysis is used to investigate the main model of current human resource function role. Human resource activities within the subsidiary of MNC in Taiwan are influenced by both external and internal environments, because there¡¦re many environmental factors to be considered and they are not easy to be controlled, so the study focuses on the discussion of the variables of internal environment in the organization. According to the characters of the variables, the study divides the variables into organization character and management character to investigate the influence of internal environment on human resource function role. After passing through the examination and analysis , the study result is presented as here below: 1. The major human resource function role performed by current subsidiary of MNC in Taiwan is Administrative Expert, the next is Strategic Partner, Change Agent and the last is Employee Champion. It represents that the human resource department of the subsidiary of MNC in Taiwan still do lots of works in the administration. But it¡¦s also found from the result that the roles of Strategic Partner and Change Agent are elevated after comparing with the previous studies. So it¡¦s assumed the position of human resource department becomes higher, human resource department involves more in the strategic management. 2. The cluster analysis is used in this study to evaluate the multiple-role model of Business Partner. The samples in the study are divided into 3 groups and named as High Level Business Partner, Middle Level Business Partner, and Low Level Business Partner. 3. The study finds that two variables, ¡§the position of human resource supervisor¡¨ and ¡§if human resource supervisor joins the management team¡¨, influence the performing level of human resource role.