The invention discloses a multi-industry smart card application system and method. The multi-industry smart card application system comprises a financial service management server, a social security service management server, a public transportation service management server, a data conversion device, a smart card, a financial service reading device, a social security service reading device and a public transportation service reading device. According to the multi-industry smart card application system and method of the invention, the multi-industry smart card is adopted as a carrier, and multi-industry services are integrated, and the integrated service mode of the multi-industry services can be realized, and user experience can be enhanced, and people's life can be greatly facilitated.