To eliminate the need of the work of large loads such as the rewrite and addition of a program for executing a job processing accompanying the development of a new job and the change of existing job contents.
When a user terminal 5 transmits a transaction inquiry command, a host device 1 specifies a screen format (1) and reports it to a relay computer 3, the relay computer 3 reads the screen format (1) and transmits it to the user terminal 5 and the user terminal 5 transmits a subscriber number and an identification number inputted by a user to the host device 1 together with a message format. The host device 1 specifies the screen format (2) and reports it to the relay computer 3, the relay computer 3 reads the screen format (2) and transmits it to the user terminal 5 and the user terminal 5 transmits a purchase money amount inputted by the user to the host device 1 together with the message format. At the time of checking the purchase money amount, the host device 1 specifies the next screen format and reports it to the relay computer 3 together with the purchase money amount and the relay computer 3 buries the purchase money amount in the screen format and transmits it to the user terminal 5. Thereafter, a purchase price payment term is confirmed by the similar procedure and a series of processings are ended.
SHIGA ICHIRO
HASUMI NOBUHISA
