Public services in Taiwan have experienced redundancies, cost cutting, closure of operations, and challenges to the quality of their services to diverse populations. Among the tasks of electronic government, electronic commerce, a mechanism of buying and selling goods and services, and transferring funds through digital communications, is the most visible trend of the information technology related changes over the last few years. Accordingly, the electronic government procurement system, an internet-based service for electronic government purchasing and information sharing, has been developed and provided to the public since 2000. Ideally, with the help of Electronic Tendering System, a subsystem of the electronic government procurement systems, tremendous paper work will no longer be necessary for companies doing business with government, and the administrative efficiency will be improved significantly. In addition, under the design of online biding procedure, the chance of procurement fraud may be limited as well. The purposes of this paper are as follows: 1. Discuss the ongoing promoting programs of electronic government procurement internationally. 2. Analyze the key factors of the establishment and implementation of the Electronic Tendering System locally. 3. Propose strategies for the implementation of the electronic government procurement system. In this paper, we discuss the essence of electronic commerce and introduce the international opportune movement for government departments to reinvent their organizations by implementing electronic procurement systems. In particular, we examine the antecedents of the technology usage in the context of an integrated model. Answering what the key factors of the successful information systems are is crucial to the development an effective electronic government procurement system program.