A new control system has been introduced for the KEK electron/positron linac which comprises seven VME stations with the OS-9 operating system and UNIX-based workstations. All of the VME stations and workstations communicate with each other, using the TCP/IP protocol through an Ethernet connection. New control software has been developed with attention being paid to a smooth transition from the old control system. The new software provides transparent functions for controlling the basic accelerator components. The new system started operation in October, 1993.