The Internet of Things (IoT) brings promising opportunities and challenges It attracts great attentions, and has important economic and social values IoT will play a key role in the next generation of information, network, and communication developing Future IoT may bring us an era of harmony of man with nature, which means harmony fusion of Physical space, Cyber space, and Social space We will witness emancipation not only from onerous labor works brought by machine human interface, but also from the spatial temporal constrains in Physical space, and will achieve substantial benefits from IT development.