Abstract: Through comparative analysis of IP-ownership laws and policies of the state inv estment R&D projects in US, Germany, Japan and Taiwan, this paper discusses some possible IP-ownership issues in existence. Then it continues to point out the possible solutions to have a clear ownership under different situations such as service invention-creation and non-service invention-creation, under-contrac t and non-contract, etc. On the basis of analyzing the legislation tendency in dealing with in IP-ownership disputes and contradictions in state R&D investm ent projects, the paper suggests in the end that the national laws or policies s hould play a bigger role in effectively encouraging the nation, collectives and individuals to create more IP-production.