Intellectual property transaction system and intellectual property transaction method

An intellectual property transaction system for transacting a license of intellectual property, comprising:

• an information receiving unit that receives input of information on a license of intellectual property and a selling price for the license from an exhibitor's terminal;
• a purchase receiving unit that receives input of a purchase price for the input information on the license of intellectual property from a purchaser's terminal;
• an increase receiving unit that increases the number of licenses of the purchased intellectual property without permission from the exhibitor according to instruction from the seller if the purchaser becomes a seller;
• and
• a sales receiving unit that receives input of a sales price for a license of intellectual property to be sold among the exhibited licenses of the intellectual property from a seller's terminal, wherein
• the system performs a sale process for the purchaser if the selling price corresponds to the purchase price, and the system performs a sale process if the purchase price corresponds to the sales price.