The embodiment of the invention discloses an authority management method and device of a block chain system, equipment and a medium. The method is applied to a blockchain node, and comprises the stepsof obtaining a contract account operation transaction request initiated based on a basic intelligent contract; according to the contract account operation transaction request, determining an accountoperation required to be performed on the contract account; authenticating the account operation according to the authority control data of the contract account; and if the authentication is passed, executing the account operation. According to the technical scheme provided by the embodiment of the invention, the systematicness, universality and easiness in execution of authority management in theblock chain are enhanced.