Abstract: In order to summarize the existing applications of blockchain technology, to study the application of blockchain technology in the future, the development process and working principle of blockchain applications are researched, and the development and application scenarios of blockchain are analyzed. It mainly makes a general outlook on the key application scenarios of blockchain technology, including education, medical care, food, Internet of Things, social assistance and targeted poverty alleviation, hoping to provide help for the construction of the application system of blockchain. 

Key words: blockchain, decentralization, distributed ledger, smart contract