6. A speech recognition method for a computer system to carry out speech recognition, comprising: performing a speech acquisition process including acquiring a speech command spoken by a user; performing a request process including requesting a predetermined speech recognition device to carry out the speech recognition of the speech command acquired in the speech acquisition process; performing a determination process including determining a content of a filler word for filling a waiting time until a result of the requested speech recognition of the speech command is obtained from the speech recognition device; performing a filler speaking process including outputting the determined content of the filler word as speech information during the waiting time; when the result of the speech recognition is acquired from the speech recognition device, performing a response process including responding to the user based on the acquired result of the speech recognition; and performing a sub-recognition process including recognizing a spoken content of the speech command acquired in the speech acquisition process, wherein: the determination process includes creating the content of the filler word containing at least part of the spoken content of the speech command recognized in the sub-recognition process; the filler speaking process includes outputting the filler word determined in the determination process; and the determination process includes creating the filler word by applying at least part of the spoken content of the speech command recognized in the sub-recognition process to a template of preset filler word.
8. The speech recognition method according to claim 6 , wherein: a ready-made filler word with a completed content is preset; the template of filler word is preset; and the determination process includes: when the sub-recognition process successfully recognizes the spoken content, creating the content of the filler word containing at least part of the spoken content of the speech command acquired by the speech acquisition device; and when the sub-recognition process unsuccessfully recognizes the spoken content, determining the ready-made filler word as an output subject.