ChinaGrid provides the nationwide grid computing platform and services for education and research purpose among 100 key universities in China. University Digital Museum Grid (UDMGrid) is one of the most important applications of ChinaGrid which aims at offering one-stop information services about kinds of digital specimens from several university digital museums in the form of grid services. During last 3 years, many versions of UDMGrid have been developed. This paper describes the progress of UDMGrid and presents key technologies of the current version such as ontology, Grid-DAI and grid monitoring. Finally, the workflow of UDMGrid is given.