1. A sensor data process method for processing data obtained from a sensor, comprising the steps of: storing data groups in a database in which a word is attached to each of said data groups, said data groups being obtained by classifying inputs from said sensor directly or after processing; classifying an input from said sensor using said database to output a classification result; temporarily storing input data from said sensor as data of a new group after classifying said input data when it is determined that said input data does not belong to any of said data groups classified in said database; and attaching a word to said data of said new group temporarily stored to store said data of said new group in said database.