Method and system for sharing privacy data based on smart contracts

A system for sharing privacy data based on smart contracts, comprising:

• a first providing device;
• a first electronic device controlled by a first user, wherein
• in response to the first providing device adding a first privacy data associated with the first user, the first providing device deploys a data contract on a first blockchain, wherein the first privacy data is stored in a first local database of the first providing device and has a first metadata, and the data contract records the first metadata of the first privacy data;
• the first providing device adds a first pointer to a relationship contract of the first providing device and provides the first pointer to the first electronic device, and the first pointer directs to the data contract;
• the first electronic device adds the first pointer to a relationship contract of the first user;
• and
• in response to the first privacy data being authorized to be shared with a second providing device, the first electronic device provides the first pointer to the second providing device to allow the second providing device to access the first privacy data through the first pointer.