Proposed are a DNP3.0-DDS gateway and a data transfer method using the same. The DNP3.0-DDS gateway includes a DNP3.0 master including a first mapping module which extracts DNP3.0 object data, generates the extracted object data as an IPC PDU and transfers the IPC PDU, and a DDS publisher including a second mapping module which receives the IPC PDU from the DNP3.0 master and maps an extracted IPC PDU value to a DDS data type. According to the DNP3.0-DDS gateway and the data transfer method using the same, by converting a system of a P3.0 server/client format into a DDS publish-subscribe format in real time, it is possible to prevent the overload phenomenon of a server when a plurality of clients request data information, and thus, real-time data processing is made possible with high reliability.