This paper discusses microprocessor based variable slip-force level damper system providing one of the autonomous-decentralized structural control schemes. This damper system consists of several dampers distributed to several floors in a building. Either each damper or each group of dampers is autonomously controlled by its decentralized controller, then providing an autonomous-decentralized control system. Autonomous-decentralized control seems very appropriate for a huge building. In this paper, as a decentralized controller, a microprocessor is utilized with very simple control algorithm integrated. The validity of the proposed control system is demonstrated by conducting experiments along with computer simulation incorporated.