On-line purchasing process using a computer and a system for the same

An on-line purchasing system using a computer, wherein a business web site is set up in a server of a buyer such that the buyer can go on line to purchase what they want from any one of suppliers, and wherein the web site mainly has a supplier trading system that allows a plurality of suppliers going on line to register their basic information and the products they sell, the supplier trading system comprising:

• a quotation management system which is a management system for the suppliers to provide the buyer quotations;
• a product trading management system which is used to manage the products available from the suppliers and the products the buyer wants to purchase;
• an inquiry/negotiation management system which manages inquiry/negotiation between the buyer and the suppliers;
• and
• an order searching management system which is used for the suppliers to manage the order made by the buyer.