A method of operating an operation server included in a check issuance service system is disclosed. In the operating method, the operation server receives a check issuance request including check issuance information including a denomination amount from a computing device, extracts an identifier of the computing device from the check issuance request, and manages the issuing point corresponding to the extracted identifier A number is retrieved from a database, a reception date of the check issuance request is generated as a check issuance date, and check printing information including the issuing point management number, the face value, and the check issuance date is generated and transmitted to the computing device and the printing device receives the check printing information sent from the computing device, prints the check printing information on check paper on which a check issuing bank and a check number are pre-printed to output an invalid check, and then the check number is input to the computing device, receives a check issuance registration request including the check number and the identifier of the computing device from the computing device, and uses the identifier of the computing device included in the check issuance registration request to perform the computing The invalid check is converted to a valid check by identifying a device, registering the check number in the database for check registration registration, and changing the bit value of the flag for check registration registration.
展开▼