Abstract: In order to make the UGL-3C seismometer adapt to the Seismic Intensity Rapid Report and Early Warning Station Data Communication Protocol, and make the instrument data communicate and transmit with the JOPENS stream server, the communication transmission software of UGL-3C instrument data adapting to JOPENS stream service is designed and developed. The software is developed based on the C++ language, and uses inter-process communication technology to package the instrument data into data packets that comply with the communication protocol and forward them, realizing the communication with the JOPENS server. After testing, the data can flow into JOPENS6.1.8 through this software.