A broadcasting data purchasing system includes an internet radio station,
a media receiver and an online shopping server. The internet radio
station provides broadcasting data. The media receiver receives, plays
the broadcasting data and judges whether the broadcasting data includes
metadata, which includes first audio information relevant to the
broadcasting data. The media receiver responds with an operation event to
output the first audio information when the broadcasting data includes
the metadata. The online shopping server includes a goods database. The
online shopping server receives the first audio information, searches for
goods data from the goods database according to the first audio
information, and stores the goods data.