This article mainly describes Remote communication system Base on GPS/GPRS technology in construction machinery, and focus on introducing the technology of data transportation between machine ECU with GPS terminal and remote control machine via RS232 serial communication circuit. In this way it provides monitoring machine online and prevents GPS terminal from removed in Construction machinery. Currently many machinery suppliers have adopted finance lease to push selling in domestic market, In order to secure selling from financial risk and guarantee monitoring machine running information, GPS/GPRS technology integrated in Construction machinery becomes one of the essential marketing measures.