The utility model discloses directory-service-based enterprise-level ICT (information and communication technology) information communication equipment, which comprises a communication network. The communication network is in bidirectional communication with an address book integration server through a data layer. The address book integration server is in bidirectional communication with an address book server through an application layer. The data layer comprises a short message server, a soft telephony server, an IP telephony server, a fax server, an RTX server, an OA server and a database. The application layer comprises an office mail server, a short message system, a telephone mate, a telephone, a fax machine, a plurality of clients, a mailbox server and a server interface. According to the technical scheme of the utility model, by means of the directory-service-based enterprise-level ICT information communication equipment, both the interconnection of an information network and a traditional telephone network, and the intercommunication of a computer terminal and a traditional communication terminal, are realized.