Under the foreseeable huge business opportunities of e-booksellers in the future, the ensuing problems of piracy will become increasingly rampant, causing economic damage not to be underestimated. Based on the theory of planned behavior, this study extends the exploration of some antecedents, such as behavioral attitude (Social Importance, Moral Obligation, and Perceived Risk Included), subjective norms (Normative Sensitivities, and Collectivism Included), and perceived behavioral control (Self-Efficacy and Convenience Included) to predict the download intention of pirated e-books and examine the association between piracy and purchase intention along with a moderating effect of idol worship. The results show that moral obligation and normative sensitivity have a significant negative impact on the download intention of pirated e-books, while the effects of collectivism, self-efficacy, and convenience are positive. Social importance and perceived risk do not significantly impact the download intention of pirated e-books. The download intention of pirated e-books has a significant negative impact on the purchase intention of legal e-books, while the moderating effect of idol worship is not obvious as expected.