Method and device for controlling live content streaming service

A method for selling products in a live content broadcast, using a first online platform that provides an online shopping mall and a second online platform, which is independent of the first online platform, that provides live content broadcasting, performed by one or more processors of a user terminal, the method comprising:

• acquiring, by the user terminal accessing the first online platform via the second online platform, information on a first set of products registered as products for sale of a user account associated with the user terminal of a seller from the first online platform;
• receiving from the seller, as a first user input on a user interface of the user terminal of the seller, a selection of a second set of products from among the first set of products to sell in the live content broadcast on a second online platform different from the first online platform prior to the live content broadcast;
• registering, in response to the first user input, the second set of products on the second online platform so that information on the second set of products is exposed on the live content broadcast screen conducted by the seller;
• receiving from the seller, as a second user input on the user interface of the seller, a selection of a third set of products to be fixedly exposed on the live content broadcast screen on the second online platform from among the second set of products;
• and
• starting the live content broadcast on the second online platform,
• sorting and displaying the second set of products on the live content broadcast screen during the live content broadcast based on information on the quantity of sales of the second set of products during the live content broadcast;
• and
• displaying an image of a representative product of the third set of products in a designated area on the live content broadcast screen, wherein the representative product is set by the seller and the image of the representative product includes information on at least the representative product,
• wherein the first online platform is an online sales platform provided by a first external device, and the second online platform is a live shopping broadcast platform provided by a second external device, and
• a purchase of a product from the second set of products or the third set of products displayed on the live content broadcast screen is made through the online sales platform.