Abstract: The application of the VoIP technology in mine communication system was mainly introduced.The present condition of the mine communication system was firstly present，the concept of the traditional PSTN communication system and its network structure were reviewed，and the concept，composition，key features and underground network structure of VoIP technology were focused on.Then，taking the communication system in six systems of a mine for example，the application of the VoIP technology in the construction and implementation of mine communication system was mainly introduced.Such services as voice communication，scheduling，emergency management and the storage services about the correlative events were achieved.Then，the advantage and prospect of the VoIP technology in operation of mine communication system was presented，and problems existing in the VoIP technology were put forward as well.Therefore，the application of VoIP technology in mine communication system greatly improves the efficiency of the mine communication.It satisfies the safe and highly-efficient production，and provides a base for construction of digital mine.

Key words: Mine communication, VoIP, Six systems, Voice communication