The invention discloses an e-commerce precision marketing method based on the Internet, and the method comprises the steps that a user uses a user client, and carries out the pre-storage of the data of the user according to the guidance of the user client; the user sequentially enters his / her height, chest circumference, shoulder breadth, foot size, waist circumference and hipline in a height input field, a chest circumference input field, a shoulder breadth input field, a shoulder breadth input field, a foot size input field, a foot size input field, a waist circumference input field and a hipline input field of the user client. According to the internet-based e-commerce precision marketing method provided by the invention, the problem that a user needs to continue to select a proper sizeafter selecting a commodity in traditional e-commerce sales is effectively solved; the client can automatically select the commodity with the proper size after the user selects the commodity only byfilling various data of the body of the user in the initial use period, so the selection time is saved, and the use experience of the user is also optimized.