The invention discloses a price comparing network shopping system and method. The system comprises a server data acquiring subsystem, a client user access subsystem and a centralized order management subsystem, wherein the server data acquiring subsystem is used for acquiring the commodity information of a third-party network supplier through database docking or information extraction and storing the commodity information into a database; the user is connected with the client user access subsystem by the network to realize the operations such as product search, product price comparison and supplier information comparison and places the order via the subsystem; the commodity search result is analyzed by the system and the user acquires the reliable and concise commodity list in consistence with the requirement; and the system unitedly submits the orders as the supplier authentication user in a certain period and ensures the customers can timely receive the purchased commodities. The invention can ensure the user to conveniently realize online shopping via mobile phones through automatically acquiring the data of the commodities in the third-party B2C online stores, analyzing the data and acquiring the simple search result.