This article focuses on the DPP's whip system and its operation in the Legislative Yuan. It attempts to introduce and analyze the formation, organization, function, and change of the whip system. Limited by time and ability, the author is unable investigate the complicated operations of the whip system in detail. The approach for analysis majors in the Western's whip system, law institutions, the DPP's whip system, some important documents and interviews. The purpose of this article is to explore member characteristics, spirit of the institution and basic operation of the DPP's whip system.