Patent ID: 8600846

Claim:
A financial transaction system for a plurality of financial transactions between members whose position can be freely changed between consuming subject and selling subject according to a contract including settling on a claim amount and an obligation amount resulting from a closed contract and performing the contract, the system comprising: a member management DB for storing member information for member authentication; a P2P transaction DB for storing transaction details according to the contract between the members; P2P DBs for each member in which a claim amount and an obligation amount according to the contract between the members are added or subtracted and recorded as incomings and outgoings; a P2P settlement DB in which final incomings and outgoings are recorded, which are calculated by addition or subtraction in the P2P DBs at regular intervals; a terminal used by the members; and a P2P server connected to the terminal via a wired/wireless communication network, and interconnected to the member management DB, the P2P transaction DB, the P2P DBs for the respective members, and the P2P settlement DB, wherein the P2P server adds or subtracts and records the claim amount and obligation amount received from the terminal as incomings and outgoings in the P2P DBs, records details of the contract from the terminal in the transaction DB, and records final incomings or outgoings in the P2P settlement DB, the final incomings or outgoings being calculated by the addition or subtraction between the members whose position has been changed more than once between consuming subject and selling subject according to the contract in the P2P DBs at regular intervals of time period, wherein the P2P server adjusts the final incomings or outgoings stored in the P2P settlement DB, when receiving a request for an adjustment of the claim amount and the obligation amount according to the contract.