Today¡¦s motorcycle business has come to the saturation point in the market of Tawian; consequently, the major motorcycle companies recently competed with each other in building the DMS (Dealer Management System) by using the e-solutions. Through the deployment of an e-DMS (e-solutions of Dealer Management System) for shops of motorcycle, the manufacturers hope that all the channels could be more competitive. The purpose of this research is to explore the influence factors concerning the adoption of e-DMS of motorcycle¡¦s shops. After the studies of literature and empiric, the research is based on ¡§Decomposed Theory of Planned Behavior¡¨ (Taylor and Todd, 1995b) to establish the research model.This resrerch suveryed 250 samples of motorcycle¡¦s shops for study cases The result of the research indicated that factors influenced the adoption of e-DMS for motorcycle shops as follows: (1).¡§Behavioral Intention¡¨ was principally influenced by ¡§Attitude¡¨ and ¡§Perceived Behavioral Control¡¨. The later was less important than the former. ¡§Subject Norms¡¨ showed no obvious influence. (2).¡§Attitude¡¨ was mainly influenced by ¡§Perceived Usefulness¡¨, ¡§Perceived Ease of Use¡¨ and ¡§Compatibility¡¨. The first two factors were more important than the last one. (3).¡§Perceived Behavioral Control¡¨ was chiefly influenced by ¡§Self-efficacy¡¨ and ¡§Technology Facilitating Conditions¡¨. The later was less essential than the former. ¡§Resource Facilitating Conditions¡¨ showed no apparent influence. In the end, this research checks explanation by using three acceptance models, TAM (Davis, 1989), TPB (Ajzen, 1985) and D-TPB (Taylor and Todd, 1995b) to evaluate. All the explanations were nearly close. Because D-TPB considered the contruct of society psychology, it shows better explanation than the others.