Edge intelligence (EI), as an emerging technology, has been attracting
significant attention. It pushes the frontier of artificial intelligence
(AI) from the cloud to the network edge, aiming to embrace and support
the next-generation communications while unleashing AI services.
However, it faces challenges in its decentralized management and
security, which limit its capabilities to support services with numerous
requirements. On the other side, blockchain (BC), as a promising
decentralized technology, is beneficial to tackle the above issues.
However, there exist some technical challenges for BC, such as
transaction capacity, scalability, and fault tolerance. Motivated by
significant current interest around EI and BC, this survey examines
whether the synergy of EI and BC can make a powerful network with
combined functionalities of both cutting-edge technologies. Accordingly,
we develop EI-chain and Chain-intelligence to realize reliable
computing-power management, data administration, and model optimization
at the edges, while improving the functions of BC by leveraging
complementary characteristics of EI and BC, further making up for their
own limitations. In this survey, a wide spectrum of literature is
carefully reviewed to enable the EI-chain and Chain-intelligence.
Moreover, we cover the technological aspects of EI-chain and
Chain-intelligence: overview, motivations, and frameworks. Finally, some
challenges and future directions are explored. We believe this survey
will provide developers and researchers a comprehensive view on the
synergy of EI and BC, while accelerating the design of a powerful