Rakuten, Inc. is one of the world's leading Internet services companies and offering a wide variety of services for consumers and businesses with focus on e-commerce, finance and digital contents. Therefore, Rakuten, Inc. has extremely valuable data asset covering different fields. In order to make better usage of these data asset cross the whole Rakuten group and delivery data value to meet various business needs, Data Science Department is founded to enhance our group-wide data platform to provide better business decision support through BI and develop better data science solutions to improve our servers or even create new services. For today's presentations, I will give an introduction of how this big data intelligence ecosystem is building and show some example of how we are delivering values by meeting business needs.