The emergence of IoT and the rapid development of the internet have increased the data volumes and throughputs, requiring advanced data analysis methods and cloud computing to offload the edges and relax their hardware requirements. Our research teams apply data analysis and cloud computing in communication, smart healthcare, and blockchains. Moreover, we develop novel data mining techniques and build a cloud datacenters with virtual clusters and data security techniques. In constructing the datacenter, our teams work on the all-optical network to achieve low power consumption, high efficiency, and high scalability. Meanwhile, we develop traffic engineering, parallelization, and optimization algorithms in the all-optical datacenter to improve data transmission rates effectively.