Nowadays, corporations have to consistently advance the value of human assets in their own organizations for maintaining their competitiveness. To achieve this goal, the Human Resource (HR) Dept. plays a decisive role in the aspects of selection, training, employment, and retaining of human resource in the organization. How to improve the efficiency of the HR Dept. and enhance its status in the organizations has become the top agenda to enterprises. The development of Information Technology (IT) transforms the role of the HR Dept. in the organization. It enables HR to be a real strategic partner of corporations through the process of Organization Development. A Human Resource Information System (HRIS) based on the network technology will change the working environment of HR and further lead the transformation of the functions and roles of the HR Dept. Through conducting interviews with 9 companies, this research tries to answer the question, that is, what is the impact to the effectiveness of Human Resource Management when a HRIS is leaded in. It used literature research to analyze the characteristics of Human Resource Management (HRM) and HRIS and sorted out the possible impacts. It also used case study to sharpen the insight by sampling 9 companies which had used HRIS, including foreign and local ones. By doing the work, it drew a conclusion of the impact brought by HRIS and provided a direction of HRIS vendors. The study found that the factors of successfully leading HRIS into a company include the integration with original data, combination with the existing Enterprise Resource Planning System (ERPS), the compatibility of the existing HRIS, HR people¡¦s inability of maintaining HRIS, the suitability of HRIS for company¡¦s specific needs, and the support from high-level management. Leading in a HRIS could benefit the company from decreasing the inconvenience of human operations and increasing the quality of HR¡¦s services. The impacts on the effectiveness of HRM can be seen as the indexes which have positive reaction to HRIS: 1. Reward Management: HRIS provides fast calculation of payment and less human operations. Its tracing function in Payment Module and integration with ERPS help data exchange between HRIS and ERPS. 2. Training Development: HRIS keeps thorough training records of employees. It also can display the average training hours per person, training cost, training results, and etc. 3. Appraisal Management: The whole appraisal process can be done through HRIS, even crossing areas. 4. HR Strategy and Planning: Since HRIS is able to provide more precise data analysis, the quality of decision making of high-level management is enhanced with a great progress. 5. Team Management: Through humanity design of HRIS, more participation from employees is involved. Management spreading in different places still can use HRIS as a platform to exchange HR related information.

This research, based on literature discussion related to issues on intraorganizational power, aims to discover the critical factors affecting the power of HR department within a firm and measure their causal relation as well as correlation through questionnaires. The questionnaires, being sent to any possible representative firms within each industry on our lists, were distributed in a convenient way. They mainly contain two sets of items, one for the HR department manager, another three for the line department manager. In the HR manager one, the questionnaires has 10 questions on HR departmental power index as dependent variable in our study; in the line manager one, it has 15, 5 and 5 questions on HR effectiveness, Top Management Support and HR Innovativeness respectively as independent variable. Based on our findings after statistical analysis, we conclude the followings: 1. As the HR effectiveness increases, the power of HR department does in the same. 2. As the Top Management Support increases, the power of HR department does in the same. 3. As the HR Innovativeness increases, the power of HR department does in the same.