PROFIBUS is one of the widely used fieldbus in the world, and different automation equipments can exchange information through same interface protocol. Compared with the extensive application of PROFIBUS in Siemens, the application in FANUC CNC is seldom reported. During the development of an intelligent plant, machine configured with FANUC 0i D by extending PROFIBUS DP board was suggested. Based on the PROFIBUS communication network, bidirectional transmission between Siemens PLC and FANUC CNC was realized. Acquisition data for manufacturing executing system can be easily achieved as well.