UVSOR, a 750 MeV synchrotron light source of 53 m circumference had been operated for more than 20 years, and has been upgraded several times. After the upgrade of the magnet power supplies of the booster synchrotron in 2006, full energy injection has come to be possible, and this enabled us to start top-up operation. In order to operate injector system with top-up mode by a few staff members, the control system is needed to be upgraded to be efficient and effective. In the conference, the present status of our control system and future upgrade plans will be discussed.