Pear Fog focuses on the next-generation fog computing technology which enables billions of smart devices to share computing, storage and bandwidth resources easily. Pear Fog is not only a descending cloud - a pool of computing, networking and storage resources across the core through to the edge of the Internet, but also a new and improved powerful peer-to-peer (P2P) system incorporated within a crowd-sourced paradigm, providing Infrastructure as a Service (IaaS), Platform as a Service(PaaS), or Software as a Service(SaaS). Conforming to the XaaS (X-as-a Service) philosophy, incorporating the crowdsourcing paradigm, and agglomerating the Sharing economy, Pear Fog is able to scale up a network with a pool of resources, to provide reliable services and make a subset of fog touch the ground.