1. National Health Insurance Big Data Sharing Service National Health Insurance Big Data collected and modified every month in the purpose of research, which includes information collected during the operation of national health insurance and long-term care insurance accordance with the National Health Insurance Act as below; - eligibility, insurance benefit, health checkup, long-term care. There is two kind of Share-able Data Service 1) Sample Research DB The NHIS create a public research DB. This data has become the comerstone of planning evidence-based healthcare policies, Research databases available to the public include: Table 1. 2) Customized DB Customized DB refers to the health information data which are collected, managed, and maintained by the National Health Insurance Service to be modiffed as requested in the purpose of policy and academic research. They are provided by Statistic analysis tool in “Data analysis room” localed within the National Health Insurance Service in which PC for revied and analysis of data is installed