The embodiment of the utility model discloses an application platform system and a business service system. The application platform system comprises an isolation area system and a platform internal system, wherein the isolation area system is in communication connection with the platform internal system through an internal network; isolation region system, wherein the data forwarding module is used for acquiring external interaction data through an external network and forwarding the external interaction data to the platform internal system, and acquiring internal interaction data sent by theplatform internal system through the internal network and forwarding the internal interaction data to the external network so as to isolate the internal network from the external network, the external network is a wide area network, and the internal network is a local area network; and the platform internal system is used for communicating with a service end through an internal network. The embodiment of the utility model can provide a universal platform for providing business service for a user side, and can improve the safety of data.