Cloud computing technology is the infrastructure of most of Google’s applications.Without cloud computing,there is no Google’s innovation service. The key technologies of google cloud computing mainly include:GFS,MapReduce and BigTable,Among them,GFS provides the ability to store and access massive data; MapReduce makes parallel processing of massive information easy; BigTable makes it easy to manage and organize massive data.These technologies make it very common for those services that only super companies were able to enjoy before, and the cost is very low.This lecture gives some introductions and thought of the new technologies. It will help us to master the advances in Cloud Computing technology.