1. An audio guidance system including a speech information center having a center-side storing means storing speech information in a plurality of languages and a center-side communication means for performing communication with outside and an electronic apparatus capable of communicating with the center-side communication means, the electronic apparatus comprising: a position detecting means for detecting a position of the electronic apparatus; an electronic apparatus-side communication means for communicating with the center-side communication means; an electronic apparatus-side storing means for storing speech information used for audio guidance; a speech output means for providing audio guidance using the speech information stored in the electronic apparatus-side storing means; and an updating means for communicating with the center-side communication means through the electronic apparatus-side communication means to update the speech information in the electronic apparatus-side storing means by acquiring speech information in a language corresponding to the position information detected by the position detecting means from the center-side storing means.