This work is on the development of a web based research output repository system with a view to addressing the problems of poor preservation and dissemination of research outputs emanating from research institutions and validated research outputs from tertiary institutions in Nigeria. System development life cycle methodology was adopted in designing and implementing the web based research output repository system. Application programs written and tested in isolation worked properly when integrated into the total system to provide a user friendly environment. A web based research output knowledge repository system is an online system that serves as a centralized storage for research outputs emanating from research and tertiary institutions in Nigeria. It facilitates easy retrieval of research information by end users, gives an update on research outputs for the continuation of past research works and promotes collaboration of research interest among researchers. It therefore provides a single pool which is instrumental in creating awareness, increasing accessibility and visibility of research outputs.