This invention provides a method for transmitting data between a GPRS network terminal and IP network device, which pre-sets a corresponding relation between identification of each area and its attributed IP network side server of a PRS network on GGSN. When a GPRS mobile terminal sends data to IP network, the method includes: A GPRS mobile terminal uses its own IP address as the source address and uses general IP address as the destination address to deliver a data packet to SGSN. B SGSN receives the packet and adds the identification of the GPRS mobile terminal in GPRS network area in said IP data packet and sends it to GGSN, which extracts the area identification from the IP data packet, looks for IP address of the IP network side server and replaces the general IP address with the server IP address to send the IP data packet to IP network side to be transmitted to the IP network side server.