The invention discloses a commodity display system based on WiFi sharing, which comprises a user client, a server module and a store management module, wherein the user client is used by a terminal user to log in and use shared WiFi and is used by a merchant to submit account registration information and shared WiFi information, and performs management on an account; the server module is used forverifying whether the account registration information and the shared WiFi, which are submitted by the merchant, have a security vulnerability or not, modifying the merchant account into an administrator account after the account registration information and the shared WiFi passes the verification, and storing the account registration information and the shared WiFi information into a database module or refusing registration verification of the merchant; and the store management module comprises a commodity display information management module and a commodity promotion information managementmodule, the commodity display information management module is used for editing and displaying commodity marketing information, and the commodity promotion information management module is used for editing and managing commodity promotion information. The merchant can achieve a purpose of well popularizing store commodities with a low cost by using the system disclosed by the invention, and the store operation cost is greatly reduced.