The underlying technical logic of artificial intelligence is the combination of data + algorithms, forming a program model that supports thinking, perception and action to better serve humans. The essence of blockchain technology is encrypted distributed data storage books. The data is encrypted and distributed on multiple different servers. Only the licensed person can read and update, so you can create a tamper-proof database with high reliability. The security can be applied to the ethical aspects of AI technology, and the sensitive data is encrypted. The algorithm program built by AI technology can process the data while it is encrypted. Whether the decision formed by the AI ​​algorithm model has data credibility, whether there is human fraud, it is necessary to conduct audit before application. If the decision is recorded in the blockchain in the way of data point-to-point, then the decision is audited. It will be much simpler, and blockchain technology can track and monitor AI decisions and gain public trust. The AI ​​chain is a blockchain technology service platform specially provided for artificial intelligence technology developers. It relies on the intelligent protocol, infrastructure, open interface, main network deposit certificate function and AIC certificate of the AI ​​chain platform to serve the artificial intelligence industry.