Tezos is a blockchain with Turing complete smart contracts. The main network has been launched from September 2018. Tezos has noticed the management defects of blockchain network as early as 2014, and first proposed the solution of on chain self-governance. Tezos protocol has been carefully designed to make it easier to modify parameters and update protocols. With the self-governance system, the token holder can determine the upgrade roadmap and priority, which will help resolve the dispute and avoid hard fork. In addition, Tezos use it’s unique LPOS mechanism, nowadays more than 470 validators around the world are involved to protect the network. Also by using formal validation in code level, the maximum security of the network can be guaranteed.