The party and the state attach great importance to the development of big medical data industry. The demand of health care market is increasing. With the gradual increase in national income，the changes of consumer ideas and methods，people pay more attention to health investment. But the uneven distribution of medical resources cannot meet the growing market demand for the people in China. In recent years，the health care data rapid application of large-scale data in British and American，and the world began to develop large medical data. The space of China’s health care large data market is vast，investment hot. But the development is still in the initial stage，so there are unlimited potential in the markets. The future development trend of health care industry is “to cure as the center” to “health as the center” to change the concept of “big health”. The health care large data will lead to a broader development of large health industry. Opportunities and challenges coexist，cross-border integration and joint innovation is the only way to apply and develop the health care data. Our country should build a national health medical data center in the future. To build a healthy medical industry as a pillar industry of national economy through continuous construction and efforts，to achieve healthy Chinese dream.