Calling for electoral reform is particularly harsh in the recent years, especially after President Chen announced to adopt Single-Member Con-stituency Parallel System for the forthcoming general elections after the Conference for Governmental Reform on 5th May 2002. Unfortunately, comparison studies on alternative methods are still few. In order to ad-vance understandings on concerned circumstances, this article tries to analyse and compare political consequences, reform effects and feasibili-ties of major alternative systems, i.e. Single-Member Constituency Paral-lel System, Mixed-Member Proportional (MMP), Medium-Sized Con-stituency Parallel System, and Open-list Proportional Representation, called by different parties in the congress.