Inventory management server, inventory management system, inventory management method, and recording medium

An inventory management system comprising:

• a first server that manages an inventory of a flagship store;
• a second server that manages an inventory of a branch store in which an employee of the flagship store replaces a product;
• and
• a store terminal,
• wherein the second server is communicably connected to the store terminal,
• the second server including
• a memory;
• and
• at least one processor coupled to the memory,
• the at least one processor performing operations to:
• generate stock shortage information including information for specifying the branch store and a stock quantity of the product when the stock quantity of the product in the branch store is equal to or less than a threshold, and notify the store terminal of the stock shortage information, and
• the store terminal includes a display unit that displays inventory information based on the stock shortage information.