To acquire data capable of being released to the public like a sale price in a database corresponding to a bar code, etc., at the side of a consumer and to further process the data.

A bar code scanner 1 to read the bar code attached to merchandise, a data processor 3 to recognize and process contents of the bar code, a storage device 4 to store the data of the bar code and merchandise information, a display 2 to display the contents of the bar code, a radio part 6 to receive the merchandise information corresponding to the bar code and an external interface part 5 to output the data to the outside are included in a portable bar code reading display and device. Database information corresponding to the bar code printed on the merchandise is acquired from a POS system like in a store, etc., with the consumer's portable bar code reader, the database information is collated with the bar code data attached to the merchandise, the merchandise information like a country of manufacture, a name of a manufacturer, etc., is stored and the contents of line merchandise information is displayed on the display of the consumer's portable bar code reader. In addition, a secondary data processing is enabled by outputting the data to other device like a personal computer, etc., if necessary.