Abstract: The space environment simulator used to adopt a decentralized control model, which would lead to a large investment in human resource and a difficult equipment management problem when several space environment simulators located in different places are running in parallel. This paper proposes a centralized control system based on SCADA (Supervisory Control And Data Acquisition) and Ethernet, which is the first in China to implement the centralized control of space environment simulators. The centralized control system adopts the B/S structure and combines the centrally controlled network and the enterprise network, to provide convenient and flexible remote data services to operators and supervisors. On top of that, the centralized control system deploys protective redundancy for key equipment, which enhances the reliability of the system.