A control system for a 150 MeV FFAG accelerator complex in KURRI has been developed and served for actual commissioning of this accelerator complex with high reliability. This control system has been designed and developed by a limited number of non-specialists on accelerators and control systems in a small institute. The way how we manage the design and development of the current control system will be reviewed as well as the current status and its extending application to facilities and instruments other than our FFAG accelerator complex.