After an integrated market data system of the multiple stock exchange market receives at least one or more of information such as stock exchange identification information, preferred-buy-sell-call price and signed information and call information by each step, from at least two or more stock exchange markets: select preferred-buy-call price from at the one or more stock exchange markets based on the quantity of preferred-buy-call price for each stock exchange on the basis of identification information of stock exchange market; select preferred-sell-call price from at the one or more stock exchange markets based on the quantity of preferred-sell-call price for each stock exchange on the basis of identification information of stock exchange market; sum trading volume and trading payment of the signed information for each stock exchange market based on identification information of stock exchange market, after summing call price for each step and remaining for each stock exchange market on the basis of identification information of stock exchange market, In the end, it will be provided to a plurality of finance system.
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