PURPOSE: To reduce the time for serving dishes by analyzing data from the bar code of a cooking instruction slip at the time of the completion of cooking and displaying a waitress, etc., in charge on a call display board.

CONSTITUTION: After receiving printing data, a printer 4A prints the cooking instruction slip. Then, at the time of completing cooking, a cook reads the bar code printed in the cooking instruction slip by means of a bar code reader 8. Bar code data read by the bar code reader 8 is sent to a controller 2 again through serial communication 7A and the controller 2 analyzes received bar code data and additionally registers cooking time to master data 2A registered in advance. At the same time, the controller 2 refers to master data 2A to select the number given to the waitress, etc., in charge. Next, when the number given to the waitress, etc., in charge is sent to the call display 1 from the controller 2 through serial communication 7A, the number given to the waitress, etc., in charge on the call display 1 is lighted. Then, the waitress, etc., in charge goes to take the dish and serves it to a customer.