In recent decade, studies of high-tech industries have turned to highlight importance of knowledge and innovative interactions. The development of technological knowledge hence needs a construction of innovative milieu with collective learning process. The settlement of HSIP raised high-tech advantage and economic strength of Taiwan in global competition for pursuing sustainable development. This study tries to examine key elements of HISP's development in views of state, firms and high- tech employees. It also discusses an increasing innovative milieu of HSIP which are encouraging to lead knowledgeable innovations of high-tech industries in Taiwan.