The invention provides a cooperative edge calculation method, a block chain and a cooperative edge calculation system, and the cooperative edge calculation method is applied to the block chain and comprises the steps: receiving a cooperative task published by a cooperative initiating edge node; receiving registration information published by at least one registration edge node for the cooperativetask; determining a cooperative participation edge node from the at least one registration edge node according to the registration information; receiving a cooperation completion result published by the cooperative participation edge node; and receiving an audit report published by the audit node for the cooperation completion result, wherein the audit report is used for indicating whether the cooperative participation edge node has an improper behavior. According to the invention, the security and credibility of the cooperative edge computing service can be improved.