Provided is a platform system for connecting a producer, a seller, and a consumer with a horizontal network. The platform system for connecting a producer, a seller, and a consumer with a horizontal network through a communication network of a server comprises: a producer terminal, a seller terminal, and a consumer terminal for registering a product to be sold in a server or purchasing a product registered in the server; at least one local network module for configuring a producer, a seller, and a consumer of a specific area as a local network, and setting one of a specific producer, seller, or consumer within the local area as a team leader, and the remainder as team members; and a group purchase module for allowing at least two of the producer, the seller, and the consumer to purchase the product registered in the server by a group.;COPYRIGHT KIPO 2019
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