PURPOSE: To input data through normal voicing and to type out a specific document, by providing a means for converting input voice into character data, means for storing indexes coincident with voiced words, etc.

CONSTITUTION: The means for converting input voice into character voice, means for storing indexes coincident with voiced words and KANJI (Chinese character) corresponding to the indexes, etc., are provided. For example, a voice input appears at an input terminal IN, it is stored in an input buffer 2, discriminated by a voice input discriminating part 4, and transferred to a dictionary retrieval register 6 through a line 4a. Then, a dictionary retrieving part 5 finds candidate characters in a dictionary 9 on the basis of the voice input supplied from the input buffer 2 to the dictionary retrieval register 6 through a line 4a, and the candidate characters are inputted to a candidate storage buffer 8 through a longest-length coincidence processing part 7. Its output signal is inputted to a data saving buffer 10 and a display device 11 through an output buffer 3 to perform selection and proofreading on an original.