1. A keyword creation method comprising the steps of: inputting the answers of question items given to a user; calculating the habitual situation characteristics of said user and the degree of typical liking tendency of said user on the basis of said answers; creating a keyword of said user for each typical situation in one or more previously prepared typical individual situations on the basis of the degree of typical liking tendency of said user; and correcting said typical situation dependent keyword on the basis of the habitual situation characteristics of said user to thereby create the keyword corresponding to the actual situation of said user.