This study focuses on the changes and features of local factions' clientelist structures in Neimen Township of Kaohsiung County in Taiwan, especially under the changing political and economic circumstances of the authoritarian and post-authoritarian politics in Taiwan. We have the following empirical study findings: Firstly, the extemal-clientelist pattern of the Kuan-Ting faction and Nei-Pu faction of Neiman Township is changing from bi-faction into tri-faction. These two factions' external-clientelist relationship with county-level factions are stable and continuous. Meanwhile, their internal-clientelist structure appeared to be the economic-clientelist type when the traditional patterns of political and social-clientelist relationships were continued in recent years. Secondly, this case of the Neimen Township's factions also proves that the formation of local factions in Taiwan is built on the foundation of the historical social impacts from the changing environment. This study finds that the confrontation, growth and decline, and the splits of the Kuan-Ting and Nei-Pu factions are strongly under the influence of the White-Black-Red factions pattern in Kaohsiung County and the election levels. It says that in the serious county-faction confrontation areas, their township-level factions have a very closely structural interaction relationship with their county-level factions.