According to the survey of “ Program of Service Ecosystem Research Value Engineering (SERVE) “ conducted by the Foreseeing Innovative New Digiservice （FIND）at the Institute for Information Industry（III） and the Department of Industrial Technology of the Ministry of Economical Affairs shows that in the third quarter of 2009, the population of regular internet users is 10.57 million and the penetration rates of internet usage in Taiwan is 46% , among them, 1.25 million households access internet by fiber-optic broadband. The so-called Digital Interactive TV or Internet Protocol TV needs rely on the set-top box. Since the improvements on bandwidth and compress, people can enjoy the TV program by internet and they also can intercommunicate, likes interactive and cooperation produce with other internet users. This thesis focus on the key successful factors of Internet Protocol TV and it was made by the depth interview with renowned IPTV operators by fours perspectives on laws, regulations, and politics, market opportunities, demand sides, and macroeconomics .