To make executable a control code without using any special word by providing a combination judging means which judges the type of combination of attributes of the continuous character strings, a control code execution means which executes a specific control code when a recognized character string is shown on a display screen, etc.

An attribute judging means judges whether the attribute of a character string (words) that is outputted from a voice recognizer 4 shows an ordered product name. If the attribute shows the ordered product name, a flag (ordered product name) is set at 'presence' to show that the ordered product name is inputted to a variable stored in a RAM. Then it is judged whether a word shows the number of ordered products. If the word shows the number of ordered products, it is judged whether the flag is set at 'presence'. If the flag is set at 'presence', the line feed processing is executed by a control code execution means via a combination judging means and a line feed processor 9, and the flag is set at 'absence' to end this processing. In such a constitution, the control code can be executed with no use of any special word.