Abstract: A method for integrating e-commerce business model and transaction platform therefor is disclosed for integrating B2B, B2C, C2B, and C2C on the same transaction platform, effecting one to multiple transaction, and effecting multiple to multiple transaction. By utilizing this, a variety of advantages are obtained. For example, buyers and sellers may choose an advantageous business model based on the real market conditions with respect to the demand and the supply situations. Further, a fully competitive marketing economy is effected. Furthermore, a simplified business model and supply chains relationship are obtained. Moreover, a fair, open, high efficiency, and low cost transaction is carried out.