Smart devices have become more and more widely used today, and user scenes such as the Internet of Things(IoT) require a backend with complex computing capabilities. The traditional backend deployment relied on a cloud server. Until Baidu Function Computing came out, function invoking is so easy and the price is so low so that a cloud server is unnecessary. In addition, Baidu DuerOS Ecology, Internet of Things(IoT) Ecology, and Edge Computing have increased the ability of CFC. This session share the architecture of CFC and the practice of combining usage with Baidu's AI ecology.