This paper is focused on how to supervise and control the running condition of distant machines. Several methods of realizing distant supervision and remote control are introduced here: Dialing method of MODEM, software programming method of DELPHI, embedded system method based on Internet. Detailed contents include: theories of MODEM, programming of MODEM, communication between PC and MCS51 including local and distant ones, GUI software of PC, and development of realizing remote control of Internet on the ...